Properties of the Number -320400

Three Hundred Twenty Thousand Four Hundred

Basics

Value: -320401 → -320400 → -320399

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 9

Digital Root: 9

Palindrome: No

Factorization: 2 ⁴ × 3 ² × 5 ² × 89

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

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1001110001110010000

Octal: -1161620

Duodecimal: -135500

Hexadecimal: -4e390

Square: 102656160000

Square Root: 566.0388679233962

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

Triangular numbers that are the product of a square number and a prime number. A253653

a(n) = n²*(2·n² + (-1)ⁿ). A275496

Triangular numbers for which the sum of the digits is a square. A117404

Coreful triperfect numbers: numbers k such that csigma(k) = 3·k, where csigma(k) is the sum of the coreful divisors of k (A057723). A364990

Triangular numbers which are 9-almost primes. A76583

Refactorable triangular numbers. A272524

Triangular numbers whose sum of digits is 9. A375824

Sum of the orders of the automorphism groups for every group of order n. A385480

Triangular numbers such that the three numbers before it and the three numbers after it are squarefree. A374393