Properties of the Number 30880

Thirty Thousand Eight Hundred Eighty

Basics

Value: 30879 → 30880 → 30881

Parity: even

Prime: No

Previous Prime: 30871

Next Prime: 30881

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ⁵ × 5 × 193

Divisors: 1, 2, 4, 5, 8, 10, 16, 20, 32, 40

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 111100010100000

Octal: 74240

Duodecimal: 15A54

Hexadecimal: 78a0

Square: 953574400

Square Root: 175.72706109191037

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

Square array read by upwards antidiagonals: T(m,n) is the number of simple 3-connected triangulations of a closed region in the plane with m+3 given external edges and 3n+m internal edges, m>=0, n>=1. A210664

Number of simple triangulations of the plane with n nodes. A256

Number of permutations of the numbers 1 through 2n satisfying the "Alex Fink" condition: there is one and only one partial sum in each interval (k(n+1),(k+1)(n+1)] for 0<=k<2n-1. A126429

Partial sums of A294629. A294630

Expansion of ∏_m>=1 (1 - m·q^m)⁸. A22668

Number of compositions of n into distinct parts with exactly nine descents. A241728

Number of 6-ary rooted trees with n nodes and height at most 9. A36626

E.g.f. satisfies: A(A(x))² = A(x)² * A'(x). A179497

a(n) = floor( exp(11/18)*n! ). A30880