Properties of the Number -312987

Three Hundred Twelve Thousand Nine Hundred Eighty-Seven

Basics

Value: -312988 → -312987 → -312986

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 17 ² × 19 ²

Divisors: 1, 3, 17, 19, 51, 57, 289, 323, 361, 867

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

375 Try Today's Challenge

Representations

Binary: -1001100011010011011

Octal: -1143233

Duodecimal: -131163

Hexadecimal: -4c69b

Square: 97960862169

Square Root: 559.4524108447474

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

T(n,k)=Number of nXk 0..2 arrays with every repeated value in every row not one larger and in every column one larger mod 3 than the previous repeated value, and upper left element zero. A268092

T(n,k)=Number of nXk 0..2 arrays with every repeated value in every row and column one larger mod 3 than the previous repeated value, and upper left element zero. A267952

A modified Heron sequence starting from 1, 2. A134588

Number of n X 2 0..2 arrays with every repeated value in every row and column one larger mod 3 than the previous repeated value, and upper left element zero. A267947

Numbers n such that n and n+1 both have 18 divisors. A274360

Denominator of 3F2([3·n, -n, n+1],[2·n+1, n+1/2], 1). A277520

a(n) = n²*(n+1)*(n+2)²/6. A4256

Expansion of ∏_k>=1 1/(1+x^k)^(-1^k*k²). A307484