Properties of the Number 72920

Seventy-Two Thousand Nine Hundred Twenty

Basics

Value: 72919 → 72920 → 72921

Parity: even

Prime: No

Previous Prime: 72911

Next Prime: 72923

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ³ × 5 × 1823

Divisors: 1, 2, 4, 5, 8, 10, 20, 40, 1823, 3646

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 10001110011011000

Octal: 216330

Duodecimal: 36248

Hexadecimal: 11cd8

Square: 5317326400

Square Root: 270.03703449712225

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

T(n,k)=Number of length n+k 0..3 arrays with at most two downsteps in every k consecutive neighbor pairs. A255660

a(n) = 729·n² + 2·n. A158396

Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 27. A31705

Number of length n+1 0..3 arrays with at most two downsteps in every n consecutive neighbor pairs. A255661

a(n) = ∑_k=1..n A034693(k). A72920