Properties of the Number 28680

Twenty-Eight Thousand Six Hundred Eighty

Basics

Value: 28679 → 28680 → 28681

Parity: even

Prime: No

Previous Prime: 28669

Next Prime: 28687

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 ³ × 3 × 5 × 239

Divisors: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: Yes

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 111000000001000

Octal: 70010

Duodecimal: 14720

Hexadecimal: 7008

Square: 822542400

Square Root: 169.35170504013237

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) = n⁴ - (n-1)⁴ + (n-2)⁴ - ... 0⁴. A62392

a(n) = Fibonacci(n) + n. A2062

Numbers of the form k + wt(k) for exactly four distinct k, where wt(k) = A000120(k) is the binary weight of k. A227915

T(n,k) = Number of n X k 0..1 arrays with every element equal to 1, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. A303254

Doubly hexagonal numbers. A63249

Numbers that are the sum of seven fifth powers in two or more ways. A345605

Numbers that are the sum of seven fifth powers in exactly two ways. A346279

The first of two consecutive triangular numbers the sum of which is equal to the sum of two consecutive prime numbers. A298462

Number of ways to write n as an ordered sum of 6 primes (counting 1 as a prime). A341985

Semiperimeter of the unique primitive Pythagorean triple whose short leg is A002315(n) and such that its long leg and its hypotenuse are consecutive natural numbers. A377016