Properties of the Number -305809

Three Hundred Five Thousand Eight Hundred Nine

Basics

Value: -305810 → -305809 → -305808

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 7 ² × 79 ²

Divisors: 1, 7, 49, 79, 553, 3871, 6241, 43687, 305809

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

9108 Try Today's Challenge

Representations

Binary: -1001010101010010001

Octal: -1125221

Duodecimal: -128B81

Hexadecimal: -4aa91

Square: 93519144481

Square Root: 553

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(n) = n⁴ - 2·n³ + 3·n² - 2·n + 1, the Alexander polynomial for reef and granny knots. A58031

Number of meaningful differential operations of the n-th order on the space R⁷. A90992

Discriminants with exactly 2 associated cyclic cubic fields. A343002

Discriminants with at least 2 associated cyclic cubic fields. A343024

Composite numbers whose prime factors have no digits other than 7's and 9's. A36324

Odd squares not in A113659. A103962

Squares representable as k·m + k + m, where k >= m > 1 are squares. A256074