Properties of the Number 28057

Twenty-Eight Thousand Fifty-Seven

Basics

Value: 28056 → 28057 → 28058

Parity: odd

Prime: Yes

Previous Prime: 28051

Next Prime: 28069

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 28057

Divisors: 1, 28057

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110110110011001

Octal: 66631

Duodecimal: 142A1

Hexadecimal: 6d99

Square: 787195249

Square Root: 167.5022387910084

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

Prime numbers that are the sum of the divisors of some n. A23195

a(n) = p² + p + 1 where p runs through the primes. A60800

Primes of the form p² + p + 1 when p is prime. A53183

Terms of A000203 that are prime. A62700

Primes p such that p, p+12, p+24 are consecutive primes. A52188

Primes of the form 4·k² - 10·k + 7 with k positive. A73337

Primes of form (p^x - 1)/(p^y - 1), p prime. A3424

T(n,k)=1/25 the number of (n+1)X(k+1) 0..4 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements. A203656

Primes p of the form σ(2k-1) for a number k. A247837

K-bit primes p such that p-2ⁱ and p+2ⁱ are composite for 0<=i<=K-1. A153352