16376
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 23
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 32400
- Proper Divisor Sum (Aliquot Sum)
- 16024
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 7744
- Möbius Function
- 0
- Radical
- 4094
- Omega Function (Ω)
- 5
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 159
- 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
- Sums of 4 distinct powers of 5.at n=22A038476
- (Terms in A014472)/2.at n=23A051475
- Numbers k such that phi(k) and sigma(k) are both perfect squares.at n=14A067781
- Numbers k such that k*Sum_{d|k} 1/sigma(d) is an integer.at n=19A069166
- Numerators of coefficients in expansion of x^-2*(1-exp(-2*x))^2.at n=10A104042
- a(n) = Sum_{k=0..n} floor(C(n,k)/2).at n=15A120739
- Numbers n such that sigma(n) and sigma(sigma(n)) are both perfect squares.at n=16A134263
- a(n) = 256*n^2 - n.at n=7A158010
- a(n) = 1024*n^2 - 2*n.at n=3A158420
- a(n) = 64*n^2 - 8.at n=15A158487
- INVERT transform of (1, 3, 1, 3, 1, ...).at n=10A159612
- a(n) = 8*(2^n - 1).at n=10A159741
- Triangle of polynomial coefficients related to the o.g.f.s of the RES1 polynomials.at n=35A160468
- Partial sums of A165271.at n=45A165273
- Least common multiple of prime(n)-3 and prime(n)+3.at n=41A166011
- Row sums of triangle A166455.at n=13A166456
- Fibonacci 12-step numbers.at n=26A168083
- Expansion of o.g.f. x*(1 - x + x^2)/(1 -3*x +x^2 +3*x^3 -2*x^4).at n=14A173009
- Parameters n for which the elliptic curve y^2=x^3+n has rank 4.at n=25A179124
- Number of integers k such that floor((r^n)/k)=n, where r = golden ratio = (1+sqrt(5))/2.at n=34A182613