8866
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 28
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 16128
- Proper Divisor Sum (Aliquot Sum)
- 7262
- 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
- 3600
- Möbius Function
- 1
- Radical
- 8866
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 4
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
- 140
- 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
- Numbers that are the sum of 11 positive 8th powers.at n=21A003389
- Coordination sequence for 4-dimensional I-centered cubic orthogonal lattice.at n=13A008532
- a(n) = floor( n*(n-1)*(n-2)/22 ).at n=59A011904
- Numbers k such that k | 13^k + 13.at n=9A015905
- a(n) = s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n+1-k), where k = [ (n+1)/2 ], s = A000201 (lower Wythoff sequence).at n=33A024685
- a(n) = s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n-k+1), where k = [ n/2 ], s = A000201 (lower Wythoff sequence).at n=32A025118
- Even elements in the 5-Pascal triangle A028313.at n=45A028317
- Even elements in the 5-Pascal triangle A028313.at n=46A028317
- Distinct elements in the 5-Pascal triangle A028313.at n=54A028318
- Distinct even elements in the 5-Pascal triangle A028313.at n=26A028320
- Even elements to the right of the central elements of the 5-Pascal triangle A028313.at n=18A028321
- Elements to the right of the central elements of the 5-Pascal triangle A028313.at n=57A028323
- Elements to the right of the central elements of the 5-Pascal triangle A028313 that are not 1.at n=43A028324
- Number of necklaces with 6 black beads and n-6 white beads.at n=20A032191
- Numbers whose set of base-14 digits is {3,4}.at n=15A032838
- One quarter of 9-factorial numbers.at n=3A035017
- Number of partitions of n into parts not of the form 19k, 19k+4 or 19k-4. Also number of partitions with at most 3 parts of size 1 and differences between parts at distance 8 are greater than 1.at n=35A035973
- Numerators of continued fraction convergents to sqrt(76).at n=8A041134
- Numerators of continued fraction convergents to sqrt(684).at n=6A042314
- 21-gonal numbers: a(n) = n*(19n - 17)/2.at n=31A051873