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Properties of the Number 8805

Eight Thousand Eight Hundred Five

Basics

Value: 8804 → 8805 → 8806

Parity: odd

Prime: No

Previous Prime: 8803

Next Prime: 8807

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 587

Divisors: 1, 3, 5, 15, 587, 1761, 2935, 8805

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 10001001100101

Octal: 21145

Duodecimal: 5119

Hexadecimal: 2265

Square: 77528025

Square Root: 93.83496150156401

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

T(n,k) = Number of length n+5 0..k arrays with every six consecutive terms having two times the sum of some two elements equal to the sum of the remaining four. A249085
Number of ordered triples of integers from [ 1..n ] with no global factor. A15631
Least k such that gcd(prime(k)+1, prime(k+1)+1) = 2n. A67603
a(n) = 9·n2 - 13·n + 5. A214675
Numbers that are divisible by the product of their factorial base digits (A208575). A286590
Number of intersection points when every pair of vertices of a row of n adjacent congruent rectangles are joined by an infinite line. A347750
a(n) = ∑k=1..n (-1)k-1 * binomial(floor(n/k)+2,3). A366395
Numbers k such that σ(τ(φ(k))) = φ(τ(σ(k))). A226118
Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A127388. A127386
Starts with 2; has two properties: concatenation of its digits is same string as concatenation of digits of its first differences and sequence and first differences have no term in common. When there is a choice in choosing the next term in the first differences, choose the smallest number not yet present in either the sequence or its first differences. A139334