9238
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 22
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 14400
- Proper Divisor Sum (Aliquot Sum)
- 5162
- 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
- 4440
- Möbius Function
- -1
- Radical
- 9238
- Omega Function (Ω)
- 3
- 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
- 153
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- yes
- 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
- Number of words of length n in a certain language.at n=43A005819
- From Engel product expansion of 4/7.at n=14A007768
- Numbers k such that phi(k + 12) | sigma(k) for k not congruent to 0 (mod 3).at n=35A015850
- Eight iterations of Reverse and Add are needed to reach a palindrome.at n=37A015988
- Numbers which need eight 'Reverse and Add' steps to reach a palindrome.at n=32A065213
- a(n) = ceiling(binomial(2*n-1,n-1)/n).at n=9A188669
- Number of (n+3) X 7 0..2 matrices with each 4 X 4 subblock idempotent.at n=7A224724
- Number of ballot sequences of length n having largest descent 9.at n=4A244205
- Expansion of psi(x^3)^3 / (psi(x)^2 * psi(x^2)) in powers of x where psi() is a Ramanujan theta function.at n=40A262157
- Numbers that occur only once in A155043; positions of zeros in A262505, ones in A262507.at n=3A262508
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 147", based on the 5-celled von Neumann neighborhood.at n=23A270292
- a(n) = A273059(4n+3).at n=16A275919
- Numbers k such that (4*10^k - 91)/3 is prime.at n=19A289536
- Numbers k such that (13*10^k - 139)/9 is prime.at n=16A294915
- Numbers k such that k divides the sum of digits in primorial base of all numbers from 1 to k.at n=23A333703
- a(n) is the nearest integer to the area of a triangle with sides prime(n), prime(n+1), prime(n+2).at n=33A338267
- The four digits of a(n), their three successive absolute first differences and their two successive absolute second differences are all distinct.at n=16A365258