2256
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
- 2
Divisibility
- Divisor Count
- 20
- Divisor Sum
- 5952
- Proper Divisor Sum (Aliquot Sum)
- 3696
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 736
- Möbius Function
- 0
- Radical
- 282
- Omega Function (Ω)
- 6
- 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
- yes
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 19
- 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
- a(n) = n^2*Product_{p|n} (1 + 1/p).at n=46A000082
- Number of stereoisomeric paraffins with n carbon atoms.at n=12A000626
- Numbers k such that the k-th tetrahedral number is the sum of 2 tetrahedral numbers.at n=49A002311
- Oblong (or promic, pronic, or heteromecic) numbers: a(n) = n*(n+1).at n=47A002378
- a(n) = 2*n*(2*n-1).at n=24A002939
- Numbers that are the sum of 9 positive 6th powers.at n=28A003365
- Number of unlabeled series-parallel posets (i.e., generated by unions and sums) with n nodes.at n=8A003430
- Number of points on surface of truncated cube: a(n) = 46*n^2 + 2 for n > 0.at n=7A005911
- Coordination sequence T2 for Zeolite Code AFR.at n=36A008020
- Coordination sequence T3 for Zeolite Code BRE.at n=31A008060
- Coordination sequence T1 for Zeolite Code EMT.at n=39A008086
- a(n) = lcm(n, sigma(n)).at n=46A009242
- Positive nonsquare integers k such that each term of the regular continued fraction of sqrt(k) divides k.at n=46A013654
- Number of lines through exactly 8 points of an n X n grid of points.at n=50A018815
- a(n) is the position of square of n-th prime among the powers of primes (A000961).at n=33A024624
- Positions of squares among the powers of primes (A000961).at n=47A024626
- Sorted Galois and Pseudo-Galois numbers.at n=50A028690
- Theta series of 6-dimensional perfect lattice P6.6 = A6,1.at n=17A029695
- Numbers with 20 divisors.at n=30A030638
- Numbers k such that 7*2^k+1 is prime.at n=20A032353