16407
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 23712
- Proper Divisor Sum (Aliquot Sum)
- 7305
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 10932
- Möbius Function
- 0
- Radical
- 5469
- Omega Function (Ω)
- 3
- Little Omega Function (ω)
- 2
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
- 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
- no
- Odd
- yes
Appears in sequences
- Convolved Fibonacci numbers.at n=8A001874
- Number of atoms in a decahedron with n shells.at n=27A004068
- Numbers whose base-4 representation contains exactly four 0's and three 1's.at n=16A045036
- Bisection of Fibonacci triangle A037027: even-indexed members of column sequences of A037027 (not counting leading zeros).at n=50A060920
- Sixth column (m=5) of triangle A060920 (bisection of Fibonacci triangle, even part).at n=4A061181
- Numbers n such that the sum of the digits of Sum_{k=1..n} (k!) is divisible by n.at n=17A109657
- Expansion of 3*x*(3*x+1)*(2*x-1) / ( (1+x)*(3*x^2+1) ).at n=14A143769
- a(n) = (n+1)*A000521(n)/24.at n=2A161395
- Dispersion of A016873, (5k+2), by antidiagonals.at n=49A191704
- Divisors of 196884.at n=17A199014
- Number of (w,x,y,z) with all terms in {1,...,n} and |w-x|=|x-y|+|y-z|.at n=27A212570
- Minimal number (in decimal representation) with n nonprime substrings in base-4 representation (substrings with leading zeros are considered to be nonprime).at n=32A217104
- Years >= 1801 in which Christmas falls in Sukkot.at n=11A222419
- Riordan array (1/(1-x-x^2)^2, x/(1-x-x^2)^2).at n=57A238241
- Number of length n arrays of permutations of 0..n-1 with each element moved by -1 to 1 places and every four consecutive elements having its maximum within 4 of its minimum.at n=23A263710
- Odd numbers k such that phi(k) and cototient(k) have the same prime signature.at n=20A280927
- Number of series-reduced planted achiral trees with n leaves spanning an initial interval of positive integers.at n=14A317100
- The 100 terms of the cycle that A321021 goes into.at n=54A321022
- Integers k such that A005245(m*k) < A005245(k) for some m.at n=8A380464