2340
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 9
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 36
- Divisor Sum
- 7644
- Proper Divisor Sum (Aliquot Sum)
- 5304
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 576
- Möbius Function
- 0
- Radical
- 390
- Omega Function (Ω)
- 6
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 58
- 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
- Maximal kissing number of n-dimensional laminated lattice.at n=15A002336
- Number of nonequivalent dissections of a polygon into n pentagons by nonintersecting diagonals up to rotation.at n=6A005038
- a(n) = 4*a(n-1) - a(n-2), with a(0) = 0, a(1) = 3.at n=6A005320
- Non-seed mu-atoms of period n in Mandelbrot set.at n=23A006875
- Successive integers produced by Conway's PRIMEGAME.at n=31A007542
- Coordination sequence T2 for Zeolite Code TON.at n=30A008242
- Theta series of A_5 lattice.at n=17A008445
- Floor[n(n-1)(n-2)(n-3)/14].at n=15A011924
- Numbers whose base-2 representation is the juxtaposition of two identical strings.at n=35A020330
- Numbers whose base-4 representation is the juxtaposition of two identical strings.at n=35A020332
- Numbers whose base-8 representation is the juxtaposition of two identical strings.at n=35A020336
- Place where n-th 1 occurs in A023131.at n=40A022793
- Numbers k such that sigma(k) >= 3*k.at n=40A023197
- Denominator of n*(n-3)*(3*n^2 - 6*n + 2)/(3*(n-1)*(n-2)).at n=38A023418
- Theta series of laminated lattice LAMBDA_15.at n=2A023938
- Areas of right triangles with coprime integer sides.at n=20A024365
- Ordered areas of primitive Pythagorean triangles.at n=21A024406
- Numbers that are the sum of 4 distinct positive cubes in exactly 2 ways.at n=32A025409
- Numbers that are the sum of 4 distinct positive cubes in 2 or more ways.at n=34A025412
- Number of irreducible polynomials of degree n over GF(4); dimensions of free Lie algebras.at n=7A027377