Properties of the Number 980

Nine Hundred Eighty

Basics

Value: 979 → 980 → 981

Parity: even

Prime: No

Previous Prime: 977

Next Prime: 983

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 ² × 5 × 7 ²

Divisors: 1, 2, 4, 5, 7, 10, 14, 20, 28, 35

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111010100

Octal: 1724

Duodecimal: 698

Hexadecimal: 3d4

Square: 960400

Square Root: 31.304951684997057

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

Triangle T(n,k) read by rows, giving number of graphs with n nodes (n >= 1) and k edges (0 <= k <= n(n-1)/2). A8406

a(n) = 10·a(n-1) - a(n-2); a(0) = 0, a(1) = 1. A4189

Number of non-isomorphic multiset partitions of weight n in which all parts have the same size. A306017

Numbers that are the sum of 12 positive 5th powers. A3357

Number of integer partitions of n having a unique part of least multiplicity. A362610

a(n) = 5·n². A33429

Numbers of the form 9·k² + 8·k, k an integer. A218864

Numbers whose unsorted prime signature is not unimodal. A332282

The problem of the calissons: number of ways to tile a hexagon of edge n with diamonds of side 1. Also number of plane partitions whose Young diagrams fit inside an n X n X n box. A8793

Antiharmonic numbers: numbers k such that sigma₁(k) divides sigma₂(k). A20487