1044
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
- 18
- Divisor Sum
- 2730
- Proper Divisor Sum (Aliquot Sum)
- 1686
- 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
- 336
- Möbius Function
- 0
- Radical
- 174
- Omega Function (Ω)
- 5
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 31
- 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 simple graphs on n unlabeled nodes.at n=7A000088
- Number of even sequences with period 2n.at n=8A000208
- Moser-de Bruijn sequence: sums of distinct powers of 4.at n=38A000695
- Number of distinct quadratic residues mod 10^n; also number of distinct n-digit endings of base-10 squares.at n=4A000993
- Generalized Stirling numbers, [n+2,3]_2: a(n) = n! * Sum_{k=0..n-1} (k+1)/(n-k).at n=5A001705
- Numbers that are a sum of distinct positive cubes in more than one way.at n=41A003998
- Primes written in base 5.at n=34A004679
- Number of entries in first n rows of Pascal's triangle not divisible by 3.at n=75A006048
- Number of ternary squarefree words of length n.at n=17A006156
- Numbers k such that k^16 + 1 is prime.at n=50A006313
- a(n) = (n^4 + n^2 + 2*n)/4.at n=8A006528
- Number of cycles induced by iterating the Gray-coding of an n-bit number: a(n+1) = a(n) + 2^n/C_n, where C_n = least power of 2 >= n (C_n is the length of the cycle), with a(0) = 1.at n=14A007886
- Coordination sequence T1 for Zeolite Code LAU.at n=23A008124
- Coordination sequence T1 for Zeolite Code MFS.at n=20A008173
- Coordination sequence T2 for Zeolite Code SGT.at n=20A008230
- Coordination sequence T1 for Zeolite Code VNI.at n=20A009907
- a(n) = floor(n*(n-1)*(n-2)/21).at n=29A011903
- a(n) = floor( n*(n-1)*(n-2)*(n-3)/23 ).at n=14A011933
- Number of segments created by diagonals of n-gon.at n=9A014629
- Number of ordered triples of integers from [ 1,n ] with no common factors between pairs.at n=27A015632