Properties of the Number 28293

Twenty-Eight Thousand Two Hundred Ninety-Three

Basics

Value: 28292 → 28293 → 28294

Parity: odd

Prime: No

Previous Prime: 28289

Next Prime: 28297

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 9431

Divisors: 1, 3, 9431, 28293

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111010000101

Octal: 67205

Duodecimal: 14459

Hexadecimal: 6e85

Square: 800493849

Square Root: 168.20523178545903

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

Number of semiprimes s such that 2ⁿ < s <= 2ⁿ⁺¹. A120033

Triangle read by rows: T(n,k) is the number of ascent sequences of length n with first occurrence of the maximal value at position k-1. A218580

Expansion of 1/(x^k*(1-x-2·x^k+1)) for k=6. A143449

Expansion of ∏_k>=1 (1 + x^3·k)^3·k / (1 + x^k)^k. A285294

Lucky numbers with smallest increasing gaps (upper terms). A31885

Natural numbers written out with their digits grouped in sets of 5 (leading zeros omitted). A91341

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 437", based on the 5-celled von Neumann neighborhood. A272155

Numbers k such that 30·k - 1, 30·k + 1, 30·k² - 1 and 30·k² + 1 are all prime. A359184

Number of (n+2)X(4+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the central row and column plus the two sums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally. A259002

Primes p such that p+q+1 is prime, where q is the digit-reversal of p. A333081