3596
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 23
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 6720
- Proper Divisor Sum (Aliquot Sum)
- 3124
- 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
- 1680
- Möbius Function
- 0
- Radical
- 1798
- Omega Function (Ω)
- 4
- 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
- 118
- 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 T2 for Zeolite Code ATT.at n=43A008042
- Numbers k such that the geometric mean of phi(k) and sigma(k) is an integer.at n=41A011257
- Balanced numbers: numbers k such that phi(k) (A000010) divides sigma(k) (A000203).at n=49A020492
- Numbers k such that d(k) (number of divisors) divides phi(k) (Euler function) divides sigma(k) (sum of divisors).at n=38A020493
- Long leg of more than one primitive Pythagorean triangle.at n=29A024410
- a(n) = T(2n,n-2), T given by A026670.at n=5A026673
- Square of the lower triangular normalized partition matrix.at n=40A027516
- Numbers k such that 73*2^k+1 is prime.at n=15A032386
- Number of partitions satisfying cn(2,5) + cn(3,5) <= cn(0,5).at n=36A039861
- Denominators of continued fraction convergents to sqrt(14).at n=11A041021
- Denominators of continued fraction convergents to sqrt(126).at n=5A041229
- Numbers n such that string 9,6 occurs in the base 10 representation of n but not of n-1.at n=38A044428
- Numbers k such that string 9,6 occurs in the base 10 representation of k but not of k+1.at n=38A044809
- Numbers k such that phi(k)*d(k) is a multiple of sigma(k), where d(k) is the number of divisors of k.at n=20A050934
- Number of 3 X 3 stochastic matrices under row and column permutations.at n=30A052282
- a(n) = ceiling(a(n-1)*3/2) with a(1) = 1.at n=19A061419
- Numbers n such that the arithmetic, geometric and harmonic means of phi(n) and sigma(n) are all integers.at n=8A065146
- Numbers k such that sigma(k) divides k*phi(k).at n=41A066995
- Numbers k such that sigma(k) = bigomega(k) * phi(k).at n=5A067238
- Let (x_n, y_n) be n-th solution to the Pell equation x^2 = 14*y^2 + 1. Sequence gives {y_n}.at n=3A068204