2385
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
- 2
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 4212
- Proper Divisor Sum (Aliquot Sum)
- 1827
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 1248
- Möbius Function
- 0
- Radical
- 795
- 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
- 102
- 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
- no
- Odd
- yes
Appears in sequences
- Number of partitions of floor(7n/2) into n nonnegative integers each no more than 7.at n=13A001979
- a(n) = a(n-1) + a(n-4) with a(0) = 0, a(1) = a(2) = a(3) = 1.at n=27A003269
- Numbers that are the sum of 12 positive 6th powers.at n=39A003368
- Cubes written backwards.at n=17A004165
- Number of fullerenes with 2n vertices (or carbon atoms).at n=21A007894
- Coordination sequence T2 for Zeolite Code MFI.at n=31A008165
- Number of Barlow packings that repeat after exactly n layers.at n=18A011768
- Molien series of 4-dimensional representation of u.g.g.r. #8.at n=17A013978
- Expansion of (1-x)/(1-x-x^4).at n=30A017898
- a(n)-th squarefree is sum of first k squarefrees for some k.at n=41A020643
- Fibonacci sequence beginning 2 9.at n=13A022114
- Generalized Catalan Numbers x^4*A(x)^2 -(1-x+x^4+x^5+x^6+x^7)*A(x) + 1 =0.at n=22A023430
- a(n) = 7^n - n^2.at n=4A024077
- Coordination sequence T4 for Zeolite Code CGS.at n=36A027368
- a(n) = n*(n+8).at n=45A028566
- Number of partitions of n into parts not of the form 21k, 21k+8 or 21k-8. Also number of partitions with at most 7 parts of size 1 and differences between parts at distance 9 are greater than 1.at n=26A035986
- Composite numbers whose prime factors contain no digits other than 3 and 5.at n=29A036315
- Positive numbers having the same set of digits in base 5 and base 9.at n=30A037432
- Triangle giving number of unbranched catapolytetragons, read by rows.at n=53A038766
- Denominators of continued fraction convergents to sqrt(867).at n=5A042675