Properties of the Number 28208

Twenty-Eight Thousand Two Hundred Eight

Basics

Value: 28207 → 28208 → 28209

Parity: even

Prime: No

Previous Prime: 28201

Next Prime: 28211

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ⁴ × 41 × 43

Divisors: 1, 2, 4, 8, 16, 41, 43, 82, 86, 164

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110111000110000

Octal: 67060

Duodecimal: 143A8

Hexadecimal: 6e30

Square: 795691264

Square Root: 167.95237420173612

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

a(n) = prime(n)³ - prime(n) * prime(n²). A291542

Numbers k such that sopfr(k) = sopfr(k - sopfr(k)). A50781

a(n) = 441·n² - 2·n. A157737

(prime(n-1) + 1)*(prime(n+1) - 1). A87105

a(n) = 64·n² - 16. A157913

a(n) = 16·n*(n+2). A114444

Number of (n+1)X6 0..1 arrays with the number of rightwards and downwards edge increases in each 2X2 subblock differing from the number in all its horizontal and vertical neighbors. A205069

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 0, 1), (0, 0, 1), (0, 1, -1), (1, -1, 0)}. A148102

Primes which are a concatenation of some permutation of the first 5 primes. A177275

After 1, numbers k > 1 such that k has fewer prime divisors than k-1, when they are counted with multiplicity. A339910