Properties of the Number -280371

Two Hundred Eighty Thousand Three Hundred Seventy-One

Basics

Value: -280372 → -280371 → -280370

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 7 × 13 ² × 79

Divisors: 1, 3, 7, 13, 21, 39, 79, 91, 169, 237

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1000100011100110011

Octal: -1043463

Duodecimal: -116303

Hexadecimal: -44733

Square: 78607897641

Square Root: 529.5007082148238

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(0) = 1; a(n) = -3 * ∑_k=1..n binomial(2·n-1,2·k-1) * a(n-k). A352278

a(n) = (n² - n + 1)*(n² + n + 1). A59826

Numbers k such that k² divides 22^k-1. A128402

Sum of squares of divisors of square numbers. A65827

Jordan function ratio J₆(n)/J₂(n). A194532

Central polygonal numbers that are nontrivially the product of two central polygonal numbers. A203173