868
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 22
- Digital Root
- 4
- Palindromic Number
- yes
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 5
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 1792
- Proper Divisor Sum (Aliquot Sum)
- 924
- 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
- 360
- Möbius Function
- 0
- Radical
- 434
- 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
- 28
- 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
- achthundertachtundsechzig· ordinal: achthundertachtundsechzigste
- English
- eight hundred sixty-eight· ordinal: eight hundred sixty-eighth
- Spanish
- ochocientos sesenta y ocho· ordinal: 868º
- French
- huit cent soixante-huit· ordinal: huit cent soixante-huitième
- Italian
- ottocentosessantotto· ordinal: 868º
- Latin
- octingenti sexaginta octo· ordinal: 868.
- Portuguese
- oitocentos e sessenta e oito· ordinal: 868º
Appears in sequences
- Construct a triangle as in A036262. Sequence is one less than the position of the first number larger than 2 in the n-th row (n-th difference).at n=31A000232
- Number of twin prime pairs < square of n-th prime.at n=54A000885
- A Fielder sequence: a(n) = a(n-1) + a(n-2) - a(n-7), n >= 8.at n=14A001636
- Numbers in which every digit contains at least one loop (version 1).at n=38A001743
- Numbers k such that the k-th tetrahedral number is the sum of 2 tetrahedral numbers.at n=30A002311
- The square sieve.at n=52A002960
- Numbers that are the sum of 4 nonzero 4th powers.at n=42A003338
- Degrees of irreducible representations of group L5(2).at n=20A003901
- Number of bracelets (turn over necklaces) with n red, 1 pink and n-1 blue beads; also reversible strings with n red and n-1 blue beads; also next-to-central column in Losanitsch's triangle A034851.at n=6A005654
- Coordination sequence T1 for Zeolite Code ANA.at n=19A008031
- Coordination sequence T2 for Zeolite Code AWW.at n=21A008046
- Coordination sequence T3 for Zeolite Code GOO.at n=20A008113
- Coordination sequence T4 for Zeolite Code GOO.at n=20A008114
- Coordination sequence T5 for Zeolite Code HEU.at n=19A008120
- Coordination sequence T2 for Zeolite Code NAT.at n=20A008204
- Coordination sequence T5 for Zeolite Code NON.at n=18A008216
- Crystal ball sequence for planar net 4.8.8.at n=25A008577
- Molien series for Weyl group E_8.at n=44A008582
- Coordination sequence T2 for Zeolite Code VET.at n=18A009903
- List of totally balanced sequences of 2n binary digits written in base 10. Binary expansion of each term contains n 0's and n 1's and reading from left to right (the most significant to the least significant bit), the number of 0's never exceeds the number of 1's.at n=48A014486