Properties of the Number -640800

Six Hundred Forty Thousand Eight Hundred

Basics

Value: -640801 → -640800 → -640799

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ⁵ × 3 ² × 5 ² × 89

Divisors: 1, 2, 3, 4, 5, 6, 8, 9, 10, 12

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10011100011100100000

Octal: -2343440

Duodecimal: -26AA00

Hexadecimal: -9c720

Square: 410624640000

Square Root: 800.49984384758

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

E.g.f. satisfies: A'(x) = (1 + x·A(x))⁵ with A(0)=1. A245247

Sum of positive even numbers up to n². A235367

Expansion of e.g.f. -LambertW(x³ * log(1-x))/6. A355993

Expansion of e.g.f. (1/x) * Series_Reversion( x*(1 + x³/6·log(1-x)) ). A370997