Properties of the Number 28217

Twenty-Eight Thousand Two Hundred Seventeen

Basics

Value: 28216 → 28217 → 28218

Parity: odd

Prime: No

Previous Prime: 28211

Next Prime: 28219

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 7 × 29 × 139

Divisors: 1, 7, 29, 139, 203, 973, 4031, 28217

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110111000111001

Octal: 67071

Duodecimal: 143B5

Hexadecimal: 6e39

Square: 796199089

Square Root: 167.97916537475712

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 graphs with loops spanning n labeled vertices. A322661

Array read by antidiagonals: T(n,k) is the number of n X n symmetric binary matrices with no row sum greater than k. A334548

Number of n X n symmetric binary matrices with no row sum greater than 4. A139680

a(n) = 49·n² - 7. A158484

Number of nX2 0..2 arrays with rows and columns lexicographically nondecreasing and the instance counts of every value within one of each other. A201426

a(0)=0, a(1)=1, a(n) = min{4 a(k) + (4^n-k-1)/3, k=0..(n-1)} for n>=2. A259665

Numbers k such that k!!! - 3^k is prime. A261316

a(n) = n*(n + 1)*(n² + n + 22)/24. A318054

Expansion of 1/((1-6x)(1-9x)(1-10x)(1-12x)). A28217