Properties of the Number -80920

Eighty Thousand Nine Hundred Twenty

Basics

Value: -80921 → -80920 → -80919

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ³ × 5 × 7 × 17 ²

Divisors: 1, 2, 4, 5, 7, 8, 10, 14, 17, 20

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10011110000011000

Octal: -236030

Duodecimal: -3A9B4

Hexadecimal: -13c18

Square: 6548046400

Square Root: 284.4644090215857

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

Molecular topological indices of the complete graph K_n. A181617

Expansion of e.g.f. exp(x³/(6 * (1-x))). A361533

a(n) = (n-1)*(n-2)*(n²+9·n+12)/24. A323847

Expansion of ∏_k>=1 (1 - x^k)²⁰. A10826

Triangle read by rows: T(n,k) = binomial(2n+1, n-k)*Fibonacci(2k+1), 0 <= k <= n. A103245

Numbers k such that core(k) = b(k,1)*b(k,0) where b(k,1) is the number of 1's in binary representation of k, b(k,0) the number of 0's and core(k) the squarefree part of k. A71639

a(n) = 2·n*binomial(n, 4). A391978