7805 (number)
7,805 (seven thousand eight hundred five) is an odd fourdigits composite number following 7804 and preceding 7806. In scientific notation, it is written as 7.805 × 10^{3}. The sum of its digits is 20. It has a total of 3 prime factors and 8 positive divisors. There are 5,328 positive integers (up to 7805) that are relatively prime to 7805.
Basic properties
 Is Prime? No
 Number parity Odd
 Number length 4
 Sum of Digits 20
 Digital Root 2
Name
Short name  7 thousand 805 

Full name  seven thousand eight hundred five 
Notation
Scientific notation  7.805 × 10^{3} 

Engineering notation  7.805 × 10^{3} 
Prime Factorization of 7805
Prime Factorization 5 × 7 × 223
Composite numberω(n)  Distinct Factors  3  Total number of distinct prime factors 

Ω(n)  Total Factors  3  Total number of prime factors 
rad(n)  Radical  7805  Product of the distinct prime numbers 
λ(n)  Liouville Lambda  1  Returns the parity of Ω(n), such that λ(n) = (1)^{Ω(n)} 
μ(n)  Mobius Mu  1  Returns:

Λ(n)  Mangoldt function  0  Returns log(p) if n is a power p^{k} of any prime p (for any k >= 1), else returns 0 
The prime factorization of 7,805 is 5 × 7 × 223. Since it has a total of 3 prime factors, 7,805 is a composite number.
Divisors of 7805
8 divisors
τ(n)  Total Divisors  8  Total number of the positive divisors of n 

σ(n)  Sum of Divisors  10752  Sum of all the positive divisors of n 
s(n)  Aliquot Sum  2947  Sum of the proper positive divisors of n 
A(n)  Arithmetic Mean  1344  Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n)) 
G(n)  Geometric Mean  88.345911054219  Returns the nth root of the product of n divisors 
H(n)  Harmonic Mean  5.8072916666667  Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors 
The number 7,805 can be divided by 8 positive divisors (out of which 0 are even, and 8 are odd). The sum of these divisors (counting 7,805) is 10,752, the average is 1,344.
Other Arithmetic Functions (n = 7805)
φ(n)  Euler Totient  5328  Total number of positive integers not greater than n that are coprime to n 

λ(n)  Carmichael Lambda  444  Smallest positive number such that a^{λ(n)} ≡ 1 (mod n) for all a coprime to n 
π(n)  Prime Pi  ≈ 991  Total number of primes less than or equal to n 
r_{2}(n)  Sum of 2 squares  0  The number of ways n can be represented as the sum of 2 squares 
There are 5,328 positive integers (less than 7,805) that are coprime with 7,805. And there are approximately 991 prime numbers less than or equal to 7,805.
Divisibility of 7805
m  2  3  4  5  6  7  8  9 

n mod m  1  2  1  0  5  0  5  2 
The number 7,805 is divisible by 5 and 7.
Classification of 7805
By Arithmetic functions
 Arithmetic
 Deficient
Expressible via specific sums
 Polite
By Powers
 Square Free
Other numbers
 LucasCarmichael
 Sphenic
Base conversion (7805)
Base  System  Value 

2  Binary  1111001111101 
3  Ternary  101201002 
4  Quaternary  1321331 
5  Quinary  222210 
6  Senary  100045 
8  Octal  17175 
10  Decimal  7805 
12  Duodecimal  4625 
16  Hexadecimal  1e7d 
20  Vigesimal  ja5 
36  Base36  60t 
Basic calculations (n = 7805)
Multiplication
n×yn×2  15610 

n×3  23415 
n×4  31220 
n×5  39025 
Division
n÷yn÷2  3902.500 

n÷3  2601.666 
n÷4  1951.250 
n÷5  1561.000 
Exponentiation
n^{y}n^{2}  60918025 

n^{3}  475465185125 
n^{4}  3711005769900625 
n^{5}  28964400034074378125 
Nth Root
^{y}√n^{2}√n  88.345911054219 

^{3}√n  19.836161512437 
^{4}√n  9.3992505581147 
^{5}√n  6.0044686474128 
7805 as geometric shapes
Circle
Radius = nDiameter  15610 

Circumference  49040.261322537 
Area  191379619.8112 
Sphere
Radius = nVolume  1991623910168.5 

Surface area  765518479.2448 
Circumference  49040.261322537 
Square
Length = nPerimeter  31220 

Area  60918025 
Diagonal  11037.936854322 
Cube
Length = nSurface area  365508150 

Volume  475465185125 
Space diagonal  13518.656553075 
Equilateral Triangle
Length = nPerimeter  23415 

Area  26378278.599188 
Altitude  6759.3282765375 
Triangular Pyramid
Length = nSurface area  105513114.39675 

Volume  56034109436.667 
Height  6372.7558141409 
Cryptographic Hash Functions
md5  c39b9a47811f1eaf3244a63ae8c22734 

sha1  aee387a1df2f170fd74eb6149f966c46bba16619 
sha256  3054e4555b64835cd1bfea533bc6ade14c335d78ecbadbd21f029722fd0f60df 
sha512  13682bd83448f30df28508eb4ff787aef1635919d72f352d7e76bff1f9138e184ba8f5000486194ddc659b53ddc66ceba65968bcf32fedecc4e0a5584575c7e3 
ripemd160  8a5d96afdf4ff14d94245f0d38f0acf7e286c099 