5868
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 27
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 18
- Divisor Sum
- 14924
- Proper Divisor Sum (Aliquot Sum)
- 9056
- 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
- 1944
- Möbius Function
- 0
- Radical
- 978
- 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
- no
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 142
- 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
- Number of genus 0 rooted maps with 3 faces with n vertices.at n=4A000184
- Number of genus 0 rooted maps with 5 faces and n vertices.at n=2A000473
- Coordination sequence for FeS2-Marcasite, Fe position.at n=40A009955
- Number of (undirected) Hamiltonian paths in n-Moebius ladder.at n=18A020875
- 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 38.at n=38A031536
- Every run of digits of n in base 3 has length 2.at n=22A033001
- Denominators of continued fraction convergents to sqrt(82).at n=3A041145
- Numbers k such that k^2 contains only digits {2,3,4}.at n=3A053916
- a(n) = Sum_{d|3} phi(d)*n^(3/d).at n=18A054602
- When squared gives number composed just of the digits 1, 2, 3, 4.at n=23A061677
- Numbers n such that sum of digits of n equals the sum of digits of n^3.at n=25A070276
- Least multiple k of prime(n) such that (k-1,k+1) forms a twin prime pair, or 0 if no such number exists.at n=37A090530
- Natural numbers written out with their digits grouped in sets of four (leading zeros omitted).at n=40A091332
- a(1) = 932; for n > 1, a(n) = a(n-1) + 1 + sum of distinct prime factors of a(n-1) that are < a(n-1).at n=18A105213
- Numbers k such that the sums of the digits of k, k^2 and k^3 coincide.at n=10A111434
- Primitive numbers n such that the sums of the digits of n, n^2 and n^3 coincide (cf. A111434).at n=4A114135
- Numbers k for which digitsum(k) + digitsum(k^2) + digitsum(k^3) = digitsum(k^4).at n=17A118470
- Let f(n) = exp(Pi*sqrt(n)); sequence gives numbers n such that f(n) - floor(f(n)) < 1/10^3.at n=9A127028
- Let f(n) = exp(Pi*sqrt(n)); sequence gives numbers n such that f(n) - floor(f(n)) < 1/10^4.at n=2A127029
- Shifts 4 places left under Dirichlet convolution.at n=52A144368