1906
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 2862
- Proper Divisor Sum (Aliquot Sum)
- 956
- 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
- 952
- Möbius Function
- 1
- Radical
- 1906
- Omega Function (Ω)
- 2
- 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
- 29
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- Squarefree Number
- yes
- 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 that are the sum of 9 positive 6th powers.at n=26A003365
- Numbers n such that n^32 + 1 is prime.at n=36A006315
- Coordination sequence T1 for Zeolite Code AEI.at n=33A008001
- Coordination sequence T4 for Zeolite Code MEL.at n=28A008153
- Coordination sequence T2 for Cordierite.at n=26A008252
- a(n) = floor(n*(n-1)*(n-2)*(n-3)/9).at n=13A011919
- Integers that are squarefree and also the sum of first k squarefrees for some k.at n=28A013932
- Numbers that are not the sum of a square and a prime.at n=37A014090
- Number of partitions of 2*n into at most 4 parts.at n=30A014126
- Numbers k such that the continued fraction for sqrt(k) has period 23.at n=4A020362
- Neither square nor square + prime.at n=16A020495
- Fibonacci sequence beginning 2, 12.at n=12A022368
- Let c(k) denote the k-th composite number and p(k) the k-th prime number; then a(n) = Sum_{i=n*(n-1)/2+1 .. n*(n+1)/2} c(i) - Sum_{i=1..n} p(i).at n=14A024850
- Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted then there are a pair of central terms both equal to 5.at n=11A031418
- Numbers with the property that all pairs of consecutive base-4 digits differ by more than 1.at n=48A032967
- Coordination sequence T4 for Zeolite Code SBS.at n=35A033611
- Expansion of Product_{d | 30} theta_3(q^d).at n=45A033742
- Decimal part of a(n)^(1/n) starts with a 'nine digits' anagram.at n=43A035136
- Positive numbers having the same set of digits in base 7 and base 8.at n=24A037438
- Coordination sequence T2 for Zeolite Code ESV.at n=29A038410