Properties of the Number 28393

Twenty-Eight Thousand Three Hundred Ninety-Three

Basics

Value: 28392 → 28393 → 28394

Parity: odd

Prime: Yes

Previous Prime: 28387

Next Prime: 28403

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 28393

Divisors: 1, 28393

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111011101001

Octal: 67351

Duodecimal: 14521

Hexadecimal: 6ee9

Square: 806162449

Square Root: 168.50222550459088

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) = sigma₄(n²)/sigma₂(n²). A84218

Primes p such that there are positive integers m and n and a prime q such that p = m²+m-q = n²+n+q. A162652

Primes of the form ((p-1)/2)²+((p+1)/2), where p is prime. A163418

Primes of the form n² + n + 1 where n is nonprime. A185632

Noncomposite numbers in the southwestern ray of the Ulam spiral as oriented on the March 1964 cover of Scientific American. A168026

Primes of the form 1 + n + n² + n³ + ... + n^k, n > 1, k > 1 where n is not prime. A285017

a(n) = n⁴ - n² + 1. A60886

Prime p1 of consecutive primes p1, p2, where p2-p1=10, and p1, p2 are in different centuries. A160500

a(n) is the largest prime factor of nⁿ - n. A372229

Primes of the form sigma₄(k)/sigma₂(k), arising in A066109. A66110