8858
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 29
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 13728
- Proper Divisor Sum (Aliquot Sum)
- 4870
- 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
- 4284
- Möbius Function
- -1
- Radical
- 8858
- Omega Function (Ω)
- 3
- 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
- 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
- a(n) = ceiling(n*phi^13), where phi is the golden ratio, A001622.at n=17A004968
- Positive numbers having the same set of digits in base 8 and base 9.at n=35A037441
- Number of partitions satisfying cn(1,5) + cn(4,5) < cn(2,5) + cn(3,5).at n=37A039892
- Numbers having three 8's in base 10.at n=21A043523
- a(n+1) = a(n)/2 if 2|a(n), a(n)/3 if 3|a(n), a(n)/5 if 5|a(n), a(n)/7 if 7|a(n), a(n)/11 if 11|a(n), a(n)/13 if 13|a(n), otherwise 17*a(n)+1.at n=12A057534
- Zero, together with positive numbers k such that prime(k) + k is a square.at n=30A064371
- One-sixtieth of the even leg of Pythagorean triangles whose other sides are both primes (other than 3, 5 or 13).at n=30A068485
- Numbers k for which the sums of prime factors (ignoring multiplicity) of sigma(k) and phi(k) are equal but the sets of prime factors of sigma and phi are different.at n=35A081378
- a(1)=1. a(n) = a(n-1) + sum of the squares which are among the first (n-1) terms of the sequence.at n=35A101135
- Numbers n such that n+prime(n) is the square of a prime.at n=7A104911
- Numbers n such that prime(n) + n is a perfect power.at n=35A107605
- Numbers n such that prime(n) + n is a prime power (A246547).at n=13A109314
- Expansion of (1/(1-x))*sum(k>=2,x^k/(1-2x^k)).at n=25A113240
- Number of base 22 circular n-digit numbers with adjacent digits differing by 4 or less.at n=4A125359
- A triangular sequence of polynomial coefficients:p(x,n)=Sum[Eulerian[n + 1, k]*Product[x + i, {i, 0, n - k + 1}]*(-x)^k, {k, 0, n}]/x.at n=28A174833
- Partial sums of A002055.at n=5A177452
- Number of line segments connecting exactly 8 points in an n x n grid of points.at n=33A177724
- Partial sums of A050705.at n=46A177791
- Numbers n such that n!10-1 is prime.at n=27A204658
- Cardinality of Image^inf({ 2 }) under repeated base-n zero-split doubling.at n=26A254638