Properties of the Number 30980

Thirty Thousand Nine Hundred Eighty

Basics

Value: 30979 → 30980 → 30981

Parity: even

Prime: No

Previous Prime: 30977

Next Prime: 30983

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ² × 5 × 1549

Divisors: 1, 2, 4, 5, 10, 20, 1549, 3098, 6196, 7745

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 111100100000100

Octal: 74404

Duodecimal: 15B18

Hexadecimal: 7904

Square: 959760400

Square Root: 176.0113632695344

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) = 1000·n - 20. A157515

Number of partitions of n the largest part of which, call it m, appears once, m-1 appears at most twice, m-2 appears at most thrice, etc. A244393

Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 88. A31766

Numbers whose set of base-13 digits is {1,4}. A32825

Interprimes which are of the form s·prime, s=20. A75295

Number of partitions satisfying cn(1,5) + cn(4,5) <= cn(0,5) + cn(2,5) + cn(3,5). A39866

Number of (1,1) pairs occurring at depth 3n of the Fibonacci tree. A305573

Number of planted noncrossing bushes with n nodes; i.e., rooted noncrossing trees with n nodes, root degree 1 and no nonroot nodes of degree 1. A30980