2644
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
- 3
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 4634
- Proper Divisor Sum (Aliquot Sum)
- 1990
- 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
- 1320
- Möbius Function
- 0
- Radical
- 1322
- Omega Function (Ω)
- 3
- 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
- 115
- 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
- Squares written in base 8.at n=37A002441
- Total number of parts in all partitions of n. Also, sum of largest parts of all partitions of n.at n=18A006128
- Coordination sequence T2 for Zeolite Code DAC.at n=32A008068
- Coordination sequence T1 for Zeolite Code FAU.at n=43A008105
- Coordination sequence T4 for Zeolite Code MEL.at n=33A008153
- a(n) = floor( n*(n-1)*(n-2)/28 ).at n=43A011910
- Numbers k such that the continued fraction for sqrt(k) has period 82.at n=3A020421
- Numbers k such that Fibonacci(k) == 3 (mod k).at n=32A023175
- Positions of record values in A030727.at n=45A030732
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 40 ones.at n=3A031808
- Numbers with exactly five distinct base-7 digits.at n=35A031984
- Records for sum of proper divisors function A001065.at n=40A034091
- Denominators of continued fraction convergents to sqrt(829).at n=10A042601
- Numbers whose base-2 representation has exactly 10 runs.at n=23A043577
- a(n) = (s(n)-1)/2, where s(n) is the n-th number whose base-2 representation has exactly 11 runs.at n=25A043691
- Numbers n such that number of runs in the base 2 representation of n is congruent to 1 mod 9.at n=34A043755
- Numbers n such that number of runs in the base 2 representation of n is congruent to 0 mod 10.at n=23A043763
- Numbers n such that string 5,7 occurs in the base 9 representation of n but not of n-1.at n=35A044303
- Numbers n such that string 4,4 occurs in the base 10 representation of n but not of n-1.at n=26A044376
- Numbers n such that string 5,7 occurs in the base 9 representation of n but not of n+1.at n=35A044684