Properties of the Number -188860

One Hundred Eighty-Eight Thousand Eight Hundred Sixty

Basics

Value: -188861 → -188860 → -188859

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 5 × 7 × 19 × 71

Divisors: 1, 2, 4, 5, 7, 10, 14, 19, 20, 28

Polygonal

Triangular: No

Square: No

Pentagonal: Yes

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101110000110111100

Octal: -560674

Duodecimal: -91364

Hexadecimal: -2e1bc

Square: 35668099600

Square Root: 434.58025725980696

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 n such that σ(n) = 8*φ(n). A104901

a(n) = ∑_{k=0..floor(n/3)} binomial(3·k,3*(n-3·k)). A391904

a(n) is the first pentagonal number that is nontrivially the sum of two pentagonal numbers of the type P(p) + P(p+n) (we always have P(k) = P(0) + P(k)). A133312