3656
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 6870
- Proper Divisor Sum (Aliquot Sum)
- 3214
- 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
- 1824
- Möbius Function
- 0
- Radical
- 914
- 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
- 131
- 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
- Coordination sequence T4 for Zeolite Code BOG.at n=43A008052
- Coordination sequence T2 for Zeolite Code EAB and OFF.at n=44A008083
- Coordination sequence T2 for Zeolite Code ERI.at n=44A008094
- Expansion of 1/sqrt(1 - 4*x + 16*x^2).at n=7A012000
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite MFS = ZSM-57 H1.5[Al1.5Si34.5O72] starting with a T1 atom.at n=11A019170
- a(n) = least m such that if r and s in {1/1, 1/3, 1/5,..., 1/(2n-1)} satisfy r < s, then r < k/m < s for some integer k.at n=48A024819
- Coordination sequence T1 for Zeolite Code MWW.at n=40A024986
- Numbers that are the sum of 4 positive cubes in exactly 3 ways.at n=36A025405
- Numbers that are the sum of 4 positive cubes in 3 or more ways.at n=38A025407
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 29.at n=21A031527
- Number of bracelets (turnover necklaces) of n beads of 2 colors, 5 of them black.at n=28A032279
- Number of partitions in parts not of the form 21k, 21k+3 or 21k-3. Also number of partitions with at most 2 parts of size 1 and differences between parts at distance 9 are greater than 1.at n=31A035981
- Coordination sequence T3 for Zeolite Code STT.at n=40A038426
- Sets of 4 consecutive numbers with equal number of divisors.at n=5A039665
- Number of partitions satisfying cn(0,5) + cn(2,5) <= cn(1,5) and cn(0,5) + cn(2,5) <= cn(4,5) and cn(0,5) + cn(3,5) <= cn(1,5) and cn(0,5) + cn(3,5) <= cn(4,5).at n=38A039883
- Numbers having four 1's in base 5.at n=35A043356
- Coordination sequence T5 for Zeolite Code ISV.at n=42A047962
- Smallest palindrome greater than n in bases n and n+1.at n=40A048268
- a(n) = Sum_{i=0..n} T(i,n-i), array T as in A049727.at n=33A049739
- Numbers k such that k^2 contains only digits {1,3,6}.at n=9A053892