3276
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 36
- Divisor Sum
- 10192
- Proper Divisor Sum (Aliquot Sum)
- 6916
- 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
- 864
- Möbius Function
- 0
- Radical
- 546
- Omega Function (Ω)
- 6
- Little Omega Function (ω)
- 4
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
- yes
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- yes
- Narcissistic Number
- no
- Collatz Steps
- 43
- 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
- Tetrahedral (or triangular pyramidal) numbers: a(n) = C(n+2,3) = n*(n+1)*(n+2)/6.at n=26A000292
- Number of compositions of n into 4 ordered relatively prime parts.at n=25A000742
- Numbers k such that (k / product of digits of k) is 1 or a prime.at n=25A001103
- Double-bitters: only even length runs in binary expansion.at n=42A001196
- Numbers m such that 3*2^m - 1 is prime.at n=27A002235
- Sum of the first n even squares: a(n) = 2*n*(n+1)*(2*n+1)/3.at n=13A002492
- Degrees of irreducible representations of Rudvalis group Ru.at n=5A003918
- Binomial coefficient C(2n,n-11).at n=3A004317
- Binomial coefficient C(4n,n-4).at n=3A004334
- Binomial coefficient C(7n,n-1).at n=3A004369
- a(n) = (6^n/n!)*Product_{k=0..n-1} (6*k + 1).at n=3A004993
- Expansion of (1-x+x^2)/((1-x)^2*(1-x^2)*(1-x^4)).at n=51A005232
- Coefficient of x^4 in (1-x-x^2)^(-n).at n=12A006504
- Coordination sequence T3 for Zeolite Code AFS and BPH.at n=44A008025
- Expansion of 1/((1-x)^2*(1-x^2)*(1-x^4)).at n=50A008804
- a(n) = lcm(n, sigma(n)).at n=35A009242
- Binomial coefficient C(28,n).at n=3A010944
- Binomial coefficient C(28,n).at n=25A010944
- a(n) = binomial(n,25).at n=3A010978
- Even tetrahedral numbers.at n=19A015220