368
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 10
- Divisor Sum
- 744
- Proper Divisor Sum (Aliquot Sum)
- 376
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- yes
Derived Values
- Euler's Totient
- 176
- Möbius Function
- 0
- Radical
- 46
- Omega Function (Ω)
- 5
- Little Omega Function (ω)
- 2
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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 19
- Smith 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
- yes
- Odd
- no
Names
- German
- dreihundertachtundsechzig· ordinal: dreihundertachtundsechzigste
- English
- three hundred sixty-eight· ordinal: three hundred sixty-eighth
- Spanish
- trescientos sesenta y ocho· ordinal: 368º
- French
- trois cent soixante-huit· ordinal: trois cent soixante-huitième
- Italian
- trecentosessantotto· ordinal: 368º
- Latin
- trecenti sexaginta octo· ordinal: 368.
- Portuguese
- trezentos e sessenta e oito· ordinal: 368º
Appears in sequences
- No-3-in-line problem on n X n grid: total number of ways of placing 2n points on n X n grid so no 3 are in a line. No symmetries are taken into account.at n=8A000755
- Conjecturally largest even integer which is an unordered sum of two primes in exactly n ways.at n=8A000954
- Coordination sequence for 4-dimensional I-centered tetragonal orthogonal lattice.at n=4A001386
- a(n) = 3^n + 5^n + 6^n.at n=3A001579
- a(n) = 3^n + n^3.at n=5A001585
- a(n) = 5^n + n^5.at n=3A001593
- Number of series-parallel networks with n edges.at n=8A001677
- Numbers k such that phi(2k-1) < phi(2k), where phi is Euler's totient function A000010.at n=5A001836
- The coding-theoretic function A(n,4,3).at n=47A001839
- Number of partitions of n with exactly two part sizes.at n=54A002133
- Numbers k for which the rank of the elliptic curve y^2 = x^3 - k is 2.at n=49A002154
- Numbers x such that x^2 + y^2 = p^2 = A002144(n)^2, x < y.at n=50A002366
- Related to a highly composite sequence (A002497).at n=18A002498
- a(n) = 8*a(n-2) - 9*a(n-4).at n=8A002536
- Number of different ways one can attack all squares on an n X n chessboard with the smallest number of non-attacking queens needed.at n=23A002568
- a(n) = Sum_{d|n, d <= 3} d^2 + 3*Sum_{d|n, d>3} d.at n=47A002660
- Number of equivalence classes of binary sequences of period n.at n=15A002729
- High temperature series in v = tanh(J/kT) for residual correlation function (correction to susceptibility) for the spin-1/2 Ising model on square lattice.at n=5A002907
- Smallest number such that n-th iterate of Chowla function is 0.at n=12A002954
- The square sieve.at n=32A002960