Properties of the Number 28729

Twenty-Eight Thousand Seven Hundred Twenty-Nine

Basics

Value: 28728 → 28729 → 28730

Parity: odd

Prime: Yes

Previous Prime: 28723

Next Prime: 28751

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 28729

Divisors: 1, 28729

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 111000000111001

Octal: 70071

Duodecimal: 14761

Hexadecimal: 7039

Square: 825355441

Square Root: 169.49631264425784

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

Primes of the form ((p+1)/2)²+((p-1)/2), where p is prime. A163419

a(n) = ∑_{1 <= x₁, x₂ <= n} gcd(x₁, x₂, n)⁴. A372926

Primes which are the sum of three distinct positive cubes in two or more distinct ways. A180088

Number of compositions of n whose standard factorization into Lyndon words has distinct strict compositions as factors. A299024

Primes p such that, if q is the next prime, p + q² is a prime times a power of 10. A352837

Value of prime number D for incrementally largest values of minimal·satisfying the equation x² - D·y² = -5. A341083

Primes p such that p² divides 2^{2^(p-1}-1) - 1. A188465

Primes of the form (k²+4)/5. A245042

Primes p such that q = p mod A001414(p-1) = p mod A001414(p+1) is prime. A339182

Value of prime number D for incrementally largest values of minimal y satisfying the equation x² - D·y² = -5. A341085