938
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 1632
- Proper Divisor Sum (Aliquot Sum)
- 694
- 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
- 396
- Möbius Function
- -1
- Radical
- 938
- 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
- 23
- 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
- neunhundertachtunddreißig· ordinal: neunhundertachtunddreißigste
- English
- nine hundred thirty-eight· ordinal: nine hundred thirty-eighth
- Spanish
- novecientos treinta y ocho· ordinal: 938º
- French
- neuf cent trente-huit· ordinal: neuf cent trente-huitième
- Italian
- novecentotrentotto· ordinal: 938º
- Latin
- nongenti triginta octo· ordinal: 938.
- Portuguese
- novecentos e trinta e oito· ordinal: 938º
Appears in sequences
- Number of cubic bicolored graphs on n unlabeled nodes admitting an automorphism exchanging the colors.at n=10A000840
- Number of twin prime pairs < square of n-th prime.at n=56A000885
- Related to Zarankiewicz's problem.at n=41A001841
- Number of sets with a congruence property.at n=2A002704
- Cald's sequence: a(n+1) = a(n) - prime(n) if that value is positive and new, otherwise a(n) + prime(n) if new, otherwise 0; start with a(1)=1.at n=100A006509
- a(n) = min_{k=1..n} (a(k-1) + 2^k*(n + a(n-k))); a(0) = 0.at n=8A006696
- Exponentiation of e.g.f. for trees A000055(n-1).at n=6A006790
- Coordination sequence T5 for Zeolite Code HEU.at n=20A008120
- Coordination sequence T1 for Zeolite Code MFS.at n=19A008173
- Coordination sequence for lattice {E_7}*.at n=2A008921
- Coordination sequence for MgZn2, Position Zn1.at n=8A009937
- a(0) = 1, a(n) = 26*n^2 + 2 for n>0.at n=6A010016
- arctanh(sinh(x)+arcsin(x))=2*x+18/3!*x^3+938/5!*x^5+122066/7!*x^7...at n=2A013040
- Numbers k such that phi(k) + 12 | sigma(k).at n=29A015805
- Expansion of 1/(1 - x^5 - x^6).at n=66A017837
- Divisors of 938.at n=7A018732
- Number of lines through at least 2 points of an n X n grid of points.at n=8A018808
- Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite GOO starting with a T2 atom.at n=4A019020
- Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite PAU = Paulingite (K2,Ca,Na2)76[Al152Si520O1344] starting with a T2 atom.at n=4A019050
- Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite PAU = Paulingite (K2,Ca,Na2)76[Al152Si520O1344] starting with a T3 atom.at n=4A019051