2634
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
- 8
- Divisor Sum
- 5280
- Proper Divisor Sum (Aliquot Sum)
- 2646
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- yes
Derived Values
- Euler's Totient
- 876
- Möbius Function
- -1
- Radical
- 2634
- Omega Function (Ω)
- 3
- 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
- 53
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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
- Number of partitions of n if there are two kinds of 1's and two kinds of 2's.at n=17A000097
- Coordination sequence T2 for Zeolite Code APD.at n=34A008035
- Coordination sequence T3 for Zeolite Code ATS.at n=37A008040
- Coordination sequence T2 for Zeolite Code LEV.at n=38A008128
- Coordination sequence T2 for Zeolite Code -WEN.at n=37A009863
- Numbers k such that the continued fraction for sqrt(k) has period 38.at n=26A020377
- First row of spectral array W(sqrt(3)).at n=18A022159
- Coordination sequence T3 for Zeolite Code MWW.at n=34A024988
- Number of symmetric {-1, +1} matrices of order n with nonnegative row and column sums.at n=4A027832
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 20 ones.at n=41A031788
- Numbers with exactly five distinct base-7 digits.at n=30A031984
- Integer part of decimal 'base-2 looking' numbers divided by their actual base-2 values (denominator of a(n) is n, numerator is n written in binary but read in decimal).at n=37A032532
- Concatenation of n and n + 8 or {n,n+8}.at n=25A032613
- Sum of first n primes of form 4k-1.at n=25A038347
- Base-5 palindromes that start with 4.at n=17A043009
- a(n)=(s(n)+3)/8, where s(n)=n-th base 8 palindrome that starts with 5.at n=27A043069
- Numbers whose base-2 representation has exactly 10 runs.at n=21A043577
- a(n) = (s(n)-1)/2, where s(n) is the n-th number whose base-2 representation has exactly 11 runs.at n=23A043691
- Numbers n such that number of runs in the base 2 representation of n is congruent to 1 mod 9.at n=32A043755
- Numbers n such that number of runs in the base 2 representation of n is congruent to 0 mod 10.at n=21A043763