1392
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 15
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 20
- Divisor Sum
- 3720
- Proper Divisor Sum (Aliquot Sum)
- 2328
- 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
- 448
- Möbius Function
- 0
- Radical
- 174
- Omega Function (Ω)
- 6
- Little Omega Function (ω)
- 3
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
- 34
- 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 ways of folding a strip of n labeled stamps.at n=7A000136
- Absolute value of Glaisher's beta'(2n+1).at n=38A002291
- Susceptibility series for diamond.at n=8A003195
- High temperature series for susceptibility for spherical model on f.c.c. lattice.at n=3A003495
- Number of ternary squarefree words of length n.at n=18A006156
- Numbers k such that sigma(x) = k has exactly 3 solutions.at n=36A007372
- Number of strict 7th-order maximal independent sets in cycle graph.at n=47A007394
- Coordination sequence T4 for Zeolite Code MEL.at n=24A008153
- Coordination sequence T4 for Zeolite Code MTT.at n=23A008192
- Expansion of (1+x)/((1-x)*(1-x^2)*(1-x^3)*(1-x^4)).at n=42A008762
- Triangle T(n,k), n>=1, read by rows, where T(n,k) is the number of lattice polygons with area n and perimeter 2*k.at n=41A008855
- Coordination sequence T4 for Zeolite Code -CLO.at n=33A009853
- Aliquot sequence starting at 552.at n=2A014360
- Numbers k such that sigma(k) = sigma(k+8).at n=11A015876
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite CHI = Chiavennite Ca4Mn4[Be8Si20O52(OH)8].8H2O starting with a T2 atom.at n=12A019092
- Coordination sequence for F_4 lattice.at n=3A019558
- Number of 3's in n-th term of A007651.at n=31A022468
- a(0)=0, a(2*n) = 2*a(n) + 2*a(n-1) + n^2 + n, a(2*n+1) = 4*a(n) + (n+1)^2.at n=32A022560
- n-th 8k+1 prime plus n-th 8k+7 prime.at n=28A022761
- a(n) = a(n-1) + c(n+1) for n >= 3, a( ) increasing, given a(1)=1, a(2)=8; where c( ) is complement of a( ).at n=46A022954