Properties of the Number -18887

Eighteen Thousand Eight Hundred Eighty-Seven

Basics

Value: -18888 → -18887 → -18886

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 11 × 17 × 101

Divisors: 1, 11, 17, 101, 187, 1111, 1717, 18887

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4938 Try Today's Challenge

Representations

Binary: -100100111000111

Octal: -44707

Duodecimal: -AB1B

Hexadecimal: -49c7

Square: 356718769

Square Root: 137.42998217274132

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

Coefficients in expansion of 1/(1 + x - 2·x⁵). A317509

Divisors of 10¹⁶ - 1. A111211

'Reverse and Add!' trajectory of 1997. A63054

11 times pentagonal numbers: 11·n*(3n-1)/2. A153449

a(n) = [xⁿ] ∏_k>=2 (1 + x^k)ⁿ. A319671

Products of three distinct strong primes. A363782

Integers n > 1997 such that the 'Reverse and Add!' trajectory of n joins the trajectory of 1997. A63055

Number of (w,x,y,z) with all terms in {1,...,n} and w+y=|x-y|+|y-z|. A212677

Number of distinct products i·j*k·l*m for 1 <= i <= j <= k <= l <= m <= n. A284988

Number of integer partitions of n with the same number of adjacent equal parts as adjacent unequal parts. A385574