3228
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
- 4
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 7560
- Proper Divisor Sum (Aliquot Sum)
- 4332
- 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
- 1072
- Möbius Function
- 0
- Radical
- 1614
- 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
- 74
- 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
- Expansion of 1/((1-x^2)*(1-x^4)^2*(1-x^6)*(1-x^8)*(1-x^10)) (even powers only).at n=31A001994
- Numbers k such that the continued fraction for sqrt(k) has period 36.at n=41A020375
- Fibonacci sequence beginning 3, 12.at n=13A022380
- Convolution of Fibonacci numbers and A023533.at n=17A023613
- Convolution of (F(2), F(3), F(4), ...) and A023533.at n=16A023655
- Number of partitions of n that do not contain 9 as a part.at n=28A027343
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 28.at n=34A031526
- Number of partitions of n into parts 3k and 3k+2 with at least one part of each type.at n=47A035619
- Base 4 digits are, in order, the first n terms of the periodic sequence with initial period 3,0,2,1.at n=5A037765
- Number of primes < n^3.at n=30A038098
- Denominators of continued fraction convergents to sqrt(808).at n=10A042559
- Numbers k such that the string 7,6 occurs in the base 9 representation of k but not of k-1.at n=43A044320
- Numbers n such that string 2,8 occurs in the base 10 representation of n but not of n-1.at n=35A044360
- Numbers n such that string 2,8 occurs in the base 10 representation of n but not of n+1.at n=35A044741
- Numbers whose base-5 representation contains exactly three 0's and one 3.at n=41A045200
- Number of distinct vampire numbers (definition 2) having 2n digits.at n=3A048935
- Discriminants of real quadratic number fields K with class number 2 such that the Hilbert class field of K is K(sqrt(3)).at n=21A052477
- Rewrite 0->100 in the binary expansion of n.at n=38A080303
- Number of primes < prime(n)^3.at n=10A086688
- a(n) = 3*(25*n + 1).at n=43A097802