Properties of the Number 20028

Twenty Thousand Twenty-Eight

Basics

Value: 20027 → 20028 → 20029

Parity: even

Prime: No

Previous Prime: 20023

Next Prime: 20029

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 2 ² × 3 × 1669

Divisors: 1, 2, 3, 4, 6, 12, 1669, 3338, 5007, 6676

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100111000111100

Octal: 47074

Duodecimal: B710

Hexadecimal: 4e3c

Square: 401120784

Square Root: 141.5203165626759

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

Number of polyhexes of class PF2 with four catafusenes annealated to pyrene. A30519

T(n,k)=Number of nXk 0..7 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value (x(i,j)+1) mod 8, and upper left element zero. A230915

a(0) = 0, a(1) = 1, for n > 1, a(n) = a(n-1) + a(n-A002487(n)). A283474

Number of n X 4 0..7 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value (x(i,j)+1) mod 8, and upper left element zero. A230911

Expansion of 1 / ((1-x)³ - x³)². A392584

Nearest integer to γ(n + 1/8)/γ(1/8). A20028