2790
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 24
- Divisor Sum
- 7488
- Proper Divisor Sum (Aliquot Sum)
- 4698
- 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
- 720
- Möbius Function
- 0
- Radical
- 930
- Omega Function (Ω)
- 5
- 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
- 128
- 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
- Number of binary partitions: number of partitions of 2n into powers of 2.at n=36A000123
- 4th forward differences of factorial numbers A000142.at n=3A001688
- Coordination sequence T1 for Zeolite Code GIS.at n=39A008266
- Expansion of (1+x^5)/((1-x)*(1-x^2)*(1-x^3)*(1-x^4)).at n=56A008766
- Aliquot sequence starting at 180.at n=10A008891
- Coordination sequence T1 for Zeolite Code -WEN.at n=38A009862
- First row of spectral array W(e-1).at n=18A022161
- Numbers that are the sum of 4 positive cubes in exactly 3 ways.at n=18A025405
- Numbers that are the sum of 4 positive cubes in 3 or more ways.at n=20A025407
- 6 times triangular numbers: a(n) = 3*n*(n+1).at n=30A028896
- Number of partitions of n with equal nonzero number of parts congruent to each of 0 and 2 (mod 5).at n=38A035563
- Coordination sequence T8 for Zeolite Code STT.at n=35A038418
- Numerators of continued fraction convergents to sqrt(940).at n=6A042818
- Numbers whose base-14 representation has exactly 4 runs.at n=29A043665
- Numbers n such that string 4,0 occurs in the base 9 representation of n but not of n-1.at n=38A044287
- Numbers k such that the string 7,4 occurs in the base 9 representation of k but not of k-1.at n=37A044318
- Numbers n such that string 7,9 occurs in the base 10 representation of n but not of n-1.at n=30A044411
- Numbers n such that string 9,0 occurs in the base 10 representation of n but not of n-1.at n=29A044422
- Numbers n such that string 4,0 occurs in the base 9 representation of n but not of n+1.at n=38A044668
- Numbers k such that string 9,0 occurs in the base 10 representation of k but not of k+1.at n=29A044803