2468
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 5
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 4326
- Proper Divisor Sum (Aliquot Sum)
- 1858
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 1232
- Möbius Function
- 0
- Radical
- 1234
- 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
- 133
- 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 phi(2k-1) < phi(2k), where phi is Euler's totient function A000010.at n=37A001836
- Number of nonequivalent dissections of an n-gon by nonintersecting diagonals rooted at a cell up to rotation.at n=6A003454
- Spiral sieve using Fibonacci numbers.at n=16A005625
- Number of words of length n in a certain language.at n=27A005819
- Coordination sequence T5 for Zeolite Code GOO.at n=34A008115
- a(n) = floor(n*(n-1)*(n-2)/30).at n=43A011912
- Phi(n) + 5 | sigma(n + 5).at n=30A015784
- a(n) is the concatenation of the first n positive even numbers.at n=3A019520
- Numbers k such that the continued fraction for sqrt(k) has period 34.at n=21A020373
- Numbers k such that Fibonacci(k) == -3 (mod k).at n=35A023164
- Index of 6^n within the sequence of the numbers of the form 2^i*6^j.at n=43A025712
- T(n,1) + T(n,2) + ... T(n,n), where T is the array in A026098.at n=15A026101
- 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 24.at n=32A031522
- Numbers whose set of base-5 digits is {3,4}.at n=38A032829
- Multiplicity of highest weight (or singular) vectors associated with character chi_57 of Monster module.at n=34A034445
- Number of partitions of n^2 into squares.at n=11A037444
- Coordination sequence for Zeolite Code DFT.at n=34A038408
- Numbers having four 3's in base 5.at n=18A043364
- Numbers having three 4's in base 8.at n=23A043439
- Numbers whose base-7 representation has exactly 5 runs.at n=9A043620