16430
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 31104
- Proper Divisor Sum (Aliquot Sum)
- 14674
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 6240
- Möbius Function
- 1
- Radical
- 16430
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 4
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
- yes
- 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
- Number of points on surface of hexagonal prism: 12*n^2 + 2 for n > 0 (coordination sequence for W(2)).at n=37A005914
- Coordination sequence for MgCu2, Mg position.at n=32A009931
- Nearest integer to Gamma(n + 7/10)/Gamma(7/10).at n=8A020016
- Integer part of Gamma(n+7/10)/Gamma(7/10).at n=8A020061
- Number of labeled, rooted, binary trees with internal nodes labeled from {1, ...,n} and leaves labeled from {0,1} such that for any path from the root to a leaf, the internal nodes receive distinct labels. In other words, the number of decision trees on n Boolean variables.at n=3A065410
- Structured truncated cubic numbers.at n=14A100152
- Triangle R, read by rows, such that R^3 transforms column k of R^3 into column k+1 of R^3, so that column k of R^3 equals column 0 of R^(3*k+3), where R^3 denotes the matrix cube of R.at n=32A113389
- Triangle, read by rows, given by the product R^-2*Q^3 = Q^-1*P^2 using triangular matrices P=A113370, Q=A113381, R=A113389.at n=41A114151
- a(n) = prime(n)^2 - prime(n^2). Commutator of (primes, squares) at n.at n=39A123914
- Number of (w,x,y,z) with all terms in {1,...,n} and w+|x-y|<=|x-z|+|y-z|.at n=31A212691
- Number of set partitions of [n] with symmetric block size list.at n=11A275282
- Number of distinct hexaflexagons of length n.at n=19A286110
- Dirichlet convolution of the identity function with A322993.at n=85A329373
- Expansion of (theta_3(x) - 1)^4 / (8 * (3 - theta_3(x))).at n=26A347807