Properties of the Number -128891

One Hundred Twenty-Eight Thousand Eight Hundred Ninety-One

Basics

Value: -128892 → -128891 → -128890

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 7 × 18413

Divisors: 1, 7, 18413, 128891

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

9108 Try Today's Challenge

Representations

Binary: -11111011101111011

Octal: -373573

Duodecimal: -6270B

Hexadecimal: -1f77b

Square: 16612889881

Square Root: 359.01392730644864

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

Numbers k such that k and k² use only the digits 1, 2, 6, 8 and 9. A137016

Consider a number n with m decimal digits. The sequence lists the numbers n having the prefix of length m-1 in the middle of the decimal expansion of n². A242942