Properties of the Number 28210

Twenty-Eight Thousand Two Hundred Ten

Basics

Value: 28209 → 28210 → 28211

Parity: even

Prime: No

Previous Prime: 28201

Next Prime: 28211

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 × 5 × 7 × 13 × 31

Divisors: 1, 2, 5, 7, 10, 13, 14, 26, 31, 35

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 110111000110010

Octal: 67062

Duodecimal: 143AA

Hexadecimal: 6e32

Square: 795804100

Square Root: 167.9583281650541

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

Partial sums of A008137. A299276

a(n) = 144·n² - n. A156635

a(n) = 576·n² - 2·n. A158371

a(n) = 196·n² - 14. A158553

Numbers k such that k = x + y, sigma₁(k) = sigma₁(x) + sigma₁(y) and sigma₂(k) = sigma₂(x) + sigma₂(y). A219033

Numbers k whose sum of divisors equals the sum of divisors of 2·k-1. A289738

Squarefree numbers k such that the sum of the distinct prime factors of k is twice the difference between the largest and the smallest prime factors of k. A324210

Irregular triangle read by rows: T(n,k) = number of k-sided polygons formed when connecting infinite lines between all vertices and all points that divide the sides of an equilateral triangle into n equal parts, for k = 3, 4, ..., max_k. A346446

a(n) = 6·a(n-1)-8·a(n-2)-3 for n > 2; a(0)=775, a(1)=8919, a(2)=34223. A177845

G.f. satisfies: A(x) = ∑_n>=0 xⁿ * (2·A(x)^2·n - A(x)ⁿ). A244062