3280
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 20
- Divisor Sum
- 7812
- Proper Divisor Sum (Aliquot Sum)
- 4532
- 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
- 1280
- Möbius Function
- 0
- Radical
- 410
- 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
- no
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 30
- 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
- Number of ways of writing n as a sum of 5 squares.at n=38A000132
- Number of circulant tournaments on 2n+1 nodes up to Cayley isomorphism.at n=15A002086
- a(n) = (3^n - 1)/2.at n=8A003462
- Theta series of D_5 lattice.at n=19A005930
- a(n) = a(n-2) + a(n-3), with a(0) = 0, a(1) = 1, a(2) = 4.at n=28A007309
- Number of unlabeled disconnected series-parallel posets with n nodes.at n=8A007454
- Coordination sequence T2 for Zeolite Code FER.at n=35A008107
- Coordination sequence T1 for Zeolite Code MTT.at n=35A008189
- a(n) = floor(n*(n-1)*(n-2)/21).at n=42A011903
- Number of ordered quadruples of integers from [ 1,n ] with no common factors between triples.at n=17A015635
- Expansion of 1/(1-x^4-x^5-x^6-x^7-x^8-x^9-x^10-x^11).at n=32A017833
- Number of subsets of { 1, ..., n } containing an A.P. of length 10.at n=19A018795
- Expansion of 1/((1-4x)(1-6x)(1-10x)).at n=3A019483
- Numbers whose base-3 representation is the juxtaposition of two identical strings.at n=39A020331
- Numbers whose base-9 representation is the juxtaposition of two identical strings.at n=39A020337
- Triangle of Gaussian binomial coefficients [ n,k ] for q = 3.at n=43A022167
- Triangle of Gaussian binomial coefficients [ n,k ] for q = 3.at n=37A022167
- Gaussian binomial coefficients [ n,7 ] for q = 3.at n=1A022198
- Plaindromes: numbers whose digits in base 3 are in nondecreasing order.at n=36A023745
- a(n) = position of n^2 + (n+1)^2 + (n+2)^2 in A004432.at n=35A024809