238
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 432
- Proper Divisor Sum (Aliquot Sum)
- 194
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- yes
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 96
- Möbius Function
- -1
- Radical
- 238
- 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
- 34
- Smith 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
Names
- German
- zweihundertachtunddreißig· ordinal: zweihundertachtunddreißigste
- English
- two hundred thirty-eight· ordinal: two hundred thirty-eighth
- Spanish
- doscientos treinta y ocho· ordinal: 238º
- French
- deux cent trente-huit· ordinal: deux cent trente-huitième
- Italian
- duecentotrentotto· ordinal: 238º
- Latin
- ducenti triginta octo· ordinal: 238.
- Portuguese
- duzentos e trinta e oito· ordinal: 238º
Appears in sequences
- Local stops on New York City 1 Train (Broadway-7 Avenue Local) subway.at n=27A000053
- Numbers k such that (2k)^4 + 1 is prime.at n=57A000059
- Numbers k such that k^4 + 1 is prime.at n=34A000068
- Denumerants: Expansion of 1/((1-x)*(1-x^2)*(1-x^5)).at n=65A000115
- Number of binary partitions: number of partitions of 2n into powers of 2.at n=17A000123
- Number of connected partially ordered sets with n unlabeled elements.at n=6A000608
- Expansion of Product_{n>=1} (1 - x^n)^7.at n=24A000730
- Numbers that are divisible by at least three different primes.at n=39A000977
- Winning moves in Fibonacci nim.at n=41A001581
- Fibonacci entry points: a(n) = smallest m > 0 such that the n-th prime divides Fibonacci(m).at n=51A001602
- A Fielder sequence.at n=8A001643
- v-pile numbers of the 3-Wythoff game with i=1.at n=55A001958
- v-pile counts for the 4-Wythoff game with i=2.at n=45A001966
- Numbers dividing A002037(i) and larger than A002037(i-1), for some i>0.at n=18A002038
- a(n) = Sum_{d|n, d <= 3} d^2 + 3*Sum_{d|n, d>3} d.at n=56A002660
- Numbers m such that 6m-1, 6m+1 are twin primes.at n=45A002822
- Ulam numbers: a(1) = 1; a(2) = 2; for n>2, a(n) = least number > a(n-1) which is a unique sum of two distinct earlier terms.at n=46A002858
- Beginnings of periodic unitary aliquot sequences.at n=18A003062
- Problimes (third definition).at n=43A003068
- a(n) = ceiling(log_2 n!).at n=54A003070