3816
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
- 24
- Divisor Sum
- 10530
- Proper Divisor Sum (Aliquot Sum)
- 6714
- 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
- 1248
- Möbius Function
- 0
- Radical
- 318
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 38
- 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
- Octagonal numbers: n*(3*n-2). Also called star numbers.at n=36A000567
- Truncated cube numbers.at n=5A005912
- Coordination sequence T2 for Zeolite Code iRON.at n=43A009882
- Even octagonal numbers: a(n) = 4*n*(3*n-1).at n=18A014642
- Coordination sequence T1 for Zeolite Code CZP.at n=40A019456
- Convolution of odd numbers and A000201.at n=18A023658
- a(n) = (prime(n+2)^2 - 1)/3.at n=25A024700
- Expansion of 1/((1-x)^4*(1-x^2)^2).at n=14A028346
- Numbers k such that in k and k^2 the parity of digits alternates.at n=27A030153
- Even numbers k such that in k^2 the parity of digits alternates.at n=39A030157
- "DHK[ 7 ]" (bracelet, identity, unlabeled, 7 parts) transform of 1,1,1,1,...at n=12A032248
- Expansion of ( Sum_{k>=0} k*q^(k^2) )^4.at n=63A037216
- G.f.: 1/((1-x)*(1-x^2))^6.at n=7A038166
- Coordination sequence T5 for Zeolite Code ESV.at n=41A038414
- Numbers k such that the string 1,6 occurs in the base 10 representation of k but not of k-1.at n=42A044348
- Iterated procedure 'composite k added to sum of its prime factors reaches a prime' yields 8 skipped primes.at n=33A050775
- Numbers k such that 285*2^k-1 is prime.at n=26A050901
- McKay-Thompson series of class 39A for Monster.at n=38A058659
- Numbers k such that sigma(x) = k has exactly 5 solutions.at n=34A060661
- Numbers k such that phi(x) = k has exactly 8 solutions.at n=42A060671