16640
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 36
- Divisor Sum
- 42924
- Proper Divisor Sum (Aliquot Sum)
- 26284
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 6144
- Möbius Function
- 0
- Radical
- 130
- Omega Function (Ω)
- 10
- Little Omega Function (ω)
- 3
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 35
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- yes
- Odd
- no
Appears in sequences
- a(n) = n*(n+3)*2^(n-3).at n=9A001793
- Numbers that are the sum of 3 positive 7th powers.at n=12A003370
- Numbers that are the sum of at most 3 positive 7th powers.at n=25A004865
- Numbers that are the sum of at most 4 positive 7th powers.at n=42A004866
- Triangle of coefficients of Chebyshev polynomials T_n(x).at n=53A008310
- a(n) = 12^n - n^6.at n=4A024146
- a(n) = A024733(n+3)/7.at n=12A024734
- Coefficients of Chebyshev polynomials of the first kind: triangle of coefficients in expansion of cos(n*x) in descending powers of cos(x).at n=51A028297
- Triangle of coefficients in expansion of sin(n*x) (or sin(n*x)/cos(x) if n is even) in ascending powers of sin(x).at n=46A028298
- Expansion of (theta_3(z)*theta_3(23z)+theta_2(z)*theta_2(23z))^4.at n=35A028660
- Dirichlet convolution of b_n=2^(n-1) with itself.at n=13A034733
- Sums of 2 distinct powers of 4.at n=25A038470
- Numbers that are divisible by exactly 10 primes with multiplicity.at n=37A046314
- Values of n^2 - 1 resulting from A050795.at n=11A050799
- Expansion of (1+2*x+3*x^2)/((1-x)^3*(1-x^2)).at n=31A055232
- Sums of two powers of 4.at n=32A055236
- Triangle of partial row sums (prs) of triangle A055249.at n=56A055252
- a(n) = product of all even numbers between n-th prime and (n+1)-st prime.at n=30A061216
- Successive maxima in sequence A007365.at n=9A065933
- Engel expansion of sinh(1/2).at n=32A068379