5768
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 26
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 12480
- Proper Divisor Sum (Aliquot Sum)
- 6712
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 2448
- Möbius Function
- 0
- Radical
- 1442
- Omega Function (Ω)
- 5
- 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
- yes
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 49
- Smith Number
- no
- Vampire 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
Appears in sequences
- Tribonacci numbers: a(n) = a(n-1) + a(n-2) + a(n-3) for n >= 3 with a(0) = a(1) = 0 and a(2) = 1.at n=17A000073
- Number of degree-n permutations of order exactly 3.at n=9A001471
- a(n) = 6*n^2 + 2 for n > 0, a(0)=1.at n=31A005897
- Coordination sequence T2 for Zeolite Code TON.at n=47A008242
- Coordination sequence for A_7 lattice.at n=3A008389
- Coordination sequence for NiAs(1), As position.at n=31A009943
- Differences between two positive cubes in exactly 2 ways.at n=3A014440
- Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite PHI = Phillipsite K2(Ca,Na2)2[Al6Si10O32].12H2O starting at a T2 atom.at n=5A019058
- a(n) = Sum_{k>=1} floor(tau^(n-k)) where tau is A001622.at n=16A020956
- a(n) = prime(n)*prime(n-1) + 1.at n=21A023523
- Numbers that are the sum of 4 distinct positive cubes in exactly 3 ways.at n=33A025410
- Numbers that are the sum of 4 distinct positive cubes in 3 or more ways.at n=37A025413
- a(n) = T(2n,n), T given by A026780.at n=6A026781
- a(n) = T(n, floor(n/2)), T given by A026780.at n=12A026786
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 17.at n=42A031515
- Difference between two positive cubes in more than one way.at n=4A034179
- Numbers ending with '8' that are the difference of two positive cubes.at n=24A038863
- Consider all quadruples {a,b,c,d} which reach {k,k,k,k} in n steps under map {a,b,c,d}->{|a-b|,|b-c|,|c-d|,|d-a|}; look at max{a,b,c,d}; sequence gives minimal value of this.at n=23A045794
- A Diaconis-Mosteller approximation to the Birthday problem function.at n=28A050255
- Numbers that are the sum of two (possibly negative) cubes in at least 2 ways.at n=22A051347