Properties of the Number 20288

Twenty Thousand Two Hundred Eighty-Eight

Basics

Value: 20287 → 20288 → 20289

Parity: even

Prime: No

Previous Prime: 20287

Next Prime: 20297

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ⁶ × 317

Divisors: 1, 2, 4, 8, 16, 32, 64, 317, 634, 1268

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 100111101000000

Octal: 47500

Duodecimal: B8A8

Hexadecimal: 4f40

Square: 411602944

Square Root: 142.43595051811886

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

The number of regions inside a vesica piscis formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts. A341877

Number of segments needed to draw (on the infinite square grid) a diagram of regions and partitions of n. A211026

Number of finite edges in the graph formed when every pair of vertices of a row of n adjacent congruent rectangles are joined by an infinite line. A347751

Number of points on surface of truncated cube: a(n) = 46·n² + 2 for n > 0. A5911

a(n) = 2ⁿ*A141316(n). A185281

Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 71. A31569

Number of ways to build a contiguous building with n LEGO blocks of size 2 X 2 on top of a fixed block of the same size. A123821

Expansion of ∏_k>=1 (1 + x^k*(1+x)) / (1 - x^k*(1+x)). A346679

Strong pseudoprimes to base 62. A20288