Properties of the Number 87885

Eighty-Seven Thousand Eight Hundred Eighty-Five

Basics

Value: 87884 → 87885 → 87886

Parity: odd

Prime: No

Previous Prime: 87881

Next Prime: 87887

Digit Sum: 36

Digital Root: 9

Palindrome: No

Factorization: 3 ⁴ × 5 × 7 × 31

Divisors: 1, 3, 5, 7, 9, 15, 21, 27, 31, 35

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101011101001101

Octal: 253515

Duodecimal: 42A39

Hexadecimal: 1574d

Square: 7723773225

Square Root: 296.45404365601087

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

a(n) = T(n,n-5), array T as in A055807. A55810

Numbers n such that the decimal digits of n² are all prime. A275971

G.f. satisfies A(x) = 1 + x·A(x)*(1 + 2·A(x)³). A364431

Number of 9-element subsets of [n] whose sum is a triangular number. A320855

Number of ways to place a non-attacking black king and white king on an n X n board, up to rotation and reflection. A357723

Numbers k such that k and k² use only the digits 2, 3, 5, 7 and 8. A137083

Powers of fifth root of 20 rounded to nearest integer. A18172

Powers of fifth root of 20 rounded up. A18173

Numbers k such that 5^k + 2 is a prime. A87885

Number of reduced pairs of orthogonal diagonal Latin squares of order n. A287651