16404
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 15
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 38304
- Proper Divisor Sum (Aliquot Sum)
- 21900
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 5464
- Möbius Function
- 0
- Radical
- 8202
- 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
- 40
- 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 3 distinct powers of 4.at n=37A038471
- A106486-encodings of combinatorial games with value 2.at n=18A125995
- Triangle read by rows: T(n,k) is the number of non-crossing connected graphs on n nodes on a circle in which the root (a distinguished node) has degree k (n >= 2, 1 <= k <= n-1).at n=23A143022
- Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 65.at n=3A156522
- Number of tatami tilings of a 3 X n grid (with monomers allowed).at n=12A180970
- Number of strings of numbers x(i=1..5) in 0..n with sum i*x(i)^2 equal to n*25.at n=43A184444
- Inversion sets of finite permutations that have only 0's and 1's in their inversion vectors.at n=22A211364
- Numbers n such that m + (sum of digits in base-4 representation of m) = n has exactly three solutions.at n=3A230635
- Number of North-East paths from (0,0) to (n,n) that have odd number of times bounce off y = x to the right.at n=7A268431
- Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 115", based on the 5-celled von Neumann neighborhood.at n=28A278917
- Number of nX4 0..1 arrays with every element unequal to 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=11A317898