Properties of the Number 28279

Twenty-Eight Thousand Two Hundred Seventy-Nine

Basics

Value: 28278 → 28279 → 28280

Parity: odd

Prime: Yes

Previous Prime: 28277

Next Prime: 28283

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 28279

Divisors: 1, 28279

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111001110111

Octal: 67167

Duodecimal: 14447

Hexadecimal: 6e77

Square: 799701841

Square Root: 168.16361080804612

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

Absolute discriminants of complex quadratic fields with 3-class group of type (3,3) and Hilbert 3-class field tower of exact length 3, except for the cases mentioned in the COMMENTS. A242878

a(n) = smallest k > 0 such that the elliptic curve y² = x³ - k has rank n, or -1 if no such k exists. A31508

Prime numbers p for which the quintic polynomial x⁵ - x - 1 modulo p completely factors into linear polynomials. A135844

Prime numbers p not of the form 10·k+1 for which the quintic polynomial x⁵-x-1 modulus p is factorizable into five binomials. A135845

Prime(n) and prime(n+3) use the same digits. A69795

Primes p such that p³-p-+1 are twin primes. A158295

Primes p with same last two digits as k, where prime(k) = p. A232102

Second term of weak prime sextet: p(m)-p(m-1) < p(m+1)-p(m) < p(m+2)-p(m+1) < p(m+3)-p(m+2) < p(m+4)-p(m+3). A54829

a(n) = smallest prime q such that ∑_{primes p <= q} 1/sqrt(p) >= n. A292775

a(n) = smallest |k| such that the elliptic curve y² = x³ + k has rank n, or -1 if no such k exists. A373795