4437
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
- 4
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 7020
- Proper Divisor Sum (Aliquot Sum)
- 2583
- 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
- 2688
- Möbius Function
- 0
- Radical
- 1479
- 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
- 20
- 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
- a(n) = (n+1)*(n+3)*(n+8)/6.at n=27A000297
- a(n) = a(n-1) + a(n-9) for n >= 9; a(n) = 1 for n=0..7; a(8) = 2.at n=47A005711
- Coordination sequence T5 for Zeolite Code MFS.at n=41A008177
- Coordination sequence T2 for Zeolite Code YUG.at n=43A008248
- Numbers that are the sum of 3 positive cubes in more than one way.at n=37A008917
- Expansion of 1/(1 - x^9 - x^10 - ...).at n=57A017903
- Numbers that are the sum of 3 distinct positive cubes in 2 or more ways.at n=24A024974
- Numbers that are the sum of 3 positive cubes in exactly 2 ways.at n=37A025396
- Numbers that are the sum of 3 distinct positive cubes in exactly 2 ways.at n=24A025400
- Every run of digits of n in base 16 has length 2.at n=19A033014
- Numbers whose base-16 expansion has no run of digits with length < 2.at n=35A033029
- Triangle giving number of unbranched catapolytetragons, read by rows.at n=52A038766
- Numbers having four 2's in base 5.at n=22A043360
- Numbers whose base-2 representation has exactly 11 runs.at n=12A043578
- a(n) = (1/2)*(n-th number whose base-2 representation has exactly 12 runs).at n=13A043686
- Numbers n such that number of runs in the base 2 representation of n is congruent to 1 mod 10.at n=24A043764
- Positive integers having more base-16 runs of even length than odd.at n=20A044842
- a(n) = A048141(3*n+1).at n=53A051059
- Numbers k for which phi(prime(k)) is a square.at n=35A062325
- Numbers k such that k and its reversal are both multiples of 17.at n=18A062906