2488
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 22
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 4680
- Proper Divisor Sum (Aliquot Sum)
- 2192
- 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
- 1240
- Möbius Function
- 0
- Radical
- 622
- Omega Function (Ω)
- 4
- 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
- 89
- 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
- Sequence of coefficients arising in connection with a rapidly converging series for Pi.at n=3A005148
- McKay-Thompson series of class 8A for Monster.at n=6A007265
- Number of non-Abelian metacyclic groups of order 2^n.at n=44A007982
- Coordination sequence T7 for Zeolite Code DDR.at n=31A008077
- Coordination sequence T5 for Zeolite Code DFO.at n=38A009879
- Coordination sequence T5 for Zeolite Code RUT.at n=33A009901
- Numbers n such that phi(n + 1) | sigma(n) for n congruent to 1 (mod 3).at n=15A015817
- Sum of gcd(x, y) for 1 <= x, y <= n.at n=31A018806
- Sum of digits in n-th term of A006711.at n=25A022480
- Expansion of Product_{m>=1} (1 + m*q^m)^4.at n=7A022632
- Coordination sequence T7 for Zeolite Code MWW.at n=34A024992
- a(1) = 5; a(n+1) = a(n)-th nonprime, where nonprimes begin at 4.at n=22A025010
- a(n) = T(2n-1,n-2), T given by A026670. Also T(2n-1,n-2) = T(2n,n+2), T given by A026725 and T(2n,n-2), T given by A026736.at n=5A026675
- Coordination sequence T3 for Zeolite Code SBS.at n=39A033610
- Numbers for which the sum of reciprocals of digits is an integer.at n=42A034708
- Numbers whose sum of reciprocals of digits is the reciprocal of an integer.at n=30A037264
- Sum of reciprocals of digits = 1.at n=12A037268
- Numbers whose base-7 representation has exactly 5 runs.at n=27A043620
- Numbers k such that string 6,4 occurs in the base 9 representation of n but not of k-1.at n=33A044309
- Numbers n such that string 8,8 occurs in the base 10 representation of n but not of n-1.at n=24A044420