Properties of the Number 28242

Twenty-Eight Thousand Two Hundred Forty-Two

Basics

Value: 28241 → 28242 → 28243

Parity: even

Prime: No

Previous Prime: 28229

Next Prime: 28277

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ³ × 523

Divisors: 1, 2, 3, 6, 9, 18, 27, 54, 523, 1046

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110111001010010

Octal: 67122

Duodecimal: 14416

Hexadecimal: 6e52

Square: 797610564

Square Root: 168.05356288993102

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 (n+1) X (k+1) 0..2 arrays with the number of clockwise edge increases in every 2 X 2 subblock unequal to the number of counterclockwise edge increases. A205823

Smallest number a(n)>a(n-1) such that T(a(n-1))+T(a(n))=T(m) for some m, a(1)=3; T(i) are the triangular numbers. A72522

Numbers k such that 2^k + 2·k + 1 is prime. A301634

a(n) = 2·A002532(n). A83694

a(0) = 1; a(n) = ∑_k=1..n prime(k+1)*a(n-k). A292744

Number of (n+1) X 3 0..2 arrays with the number of clockwise edge increases in every 2 X 2 subblock unequal to the number of counterclockwise edge increases. A205817

Number of (n+1) X 7 0..2 arrays with the number of clockwise edge increases in every 2 X 2 subblock unequal to the number of counterclockwise edge increases. A205821

Determinant of the n X n matrix whose element (i,j) equals the floor( φ^i-j + 1). A71784

First n digits of 10ⁿ!. A139543

Number of vertex cuts in the hypercube graph Q_n. A362519