Properties of the Number 8855

Eight Thousand Eight Hundred Fifty-Five

Basics

Value: 8854 → 8855 → 8856

Parity: odd

Prime: No

Previous Prime: 8849

Next Prime: 8861

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 5 × 7 × 11 × 23

Divisors: 1, 5, 7, 11, 23, 35, 55, 77, 115, 161

Polygonal

Triangular: No

Square: No

Pentagonal: Yes

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001010010111

Octal: 21227

Duodecimal: 515B

Hexadecimal: 2297

Square: 78411025

Square Root: 94.10100955887773

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Binomial coefficient binomial(n,4) = n*(n-1)*(n-2)*(n-3)/24. A332

Lucas-Carmichael numbers: squarefree composite numbers k such that p | k => p+1 | k+1. A6972

Number of intersections of diagonals in the interior of a regular n-gon. A6561

Ruth-Aaron numbers (1): sum of prime divisors of n = sum of prime divisors of n+1. A6145

Numbers m such that there are precisely 3 groups of order m. A55561

a(n) = floor(Fibonacci(n)/2). A4695

a(n) = ∑_{k=0..floor(n/4)} binomial(n-2k,2k). A5252

Pentagonal numbers with odd index: a(n) = (2·n+1)*(3·n+1). A33570

Triangular array T(n,k), read by rows: coefficients of strong divisibility sequence of polynomials p(1,x) = 1, p(2,x) = 1 + 3·x, p(n,x) = u·p(n-1,x) + v·p(n-2,x) for n >= 3, where u = p(2,x), v = 1 - x - x². A367208

Binomial coefficients formed from consecutive primes: a(n) = binomial( prime(n+1), prime(n) ). A58077