16788
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 30
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 6
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 39200
- Proper Divisor Sum (Aliquot Sum)
- 22412
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 5592
- Möbius Function
- 0
- Radical
- 8394
- Omega Function (Ω)
- 4
- 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
- 66
- 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
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 86.at n=33A031584
- Numbers with multiplicative persistence value 6.at n=12A046515
- a(n) = A104908(n) - 10*A104863(n).at n=32A104909
- Partial sums of A006567.at n=35A172463
- The number of permutations p of {1,...,n} satisfying |p(i)-p(i+1)| is in {4,5} for i from 1 to n-1.at n=37A174708
- Number of line segments connecting exactly 7 points in an n X n grid of points.at n=36A177723
- Composite numbers whose multiplicative persistence is 6.at n=11A199996
- Numbers k such that (68*10^k + 1)/3 is prime.at n=21A281296
- Expansion of Product_{k>=0} 1/(1-x^(4*k+3))^(4*k+3).at n=36A285131
- Expansion of Product_{k>=0} 1/(1 + x^(4*k+3))^(4*k+3).at n=36A285311
- Number of integer partitions of n with the same length as alternating sum.at n=55A357189
- Number of integer partitions of n with the same length as reverse-alternating sum.at n=55A357487
- Number of integer partitions of 2n - 1 with the same length as alternating sum.at n=27A357488
- Number of integer partitions of n whose odd parts are relatively prime.at n=36A366850