Properties of the Number 28243

Twenty-Eight Thousand Two Hundred Forty-Three

Basics

Value: 28242 → 28243 → 28244

Parity: odd

Prime: No

Previous Prime: 28229

Next Prime: 28277

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 61 × 463

Divisors: 1, 61, 463, 28243

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111001010011

Octal: 67123

Duodecimal: 14417

Hexadecimal: 6e53

Square: 797667049

Square Root: 168.056538105484

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

Antidiagonal sums of triangle A104684. A349713

a(n) = a(n-1) + ∑_k=0..n-3 a(k) for n >= 2, a(0)=1, a(1)=2. A49853

a(1) = 1, a(2) = 2, a(3) = 3, a(n+3) = a(n) + a(n+1). A84338

Composite numbers k for which k - φ(k) divides k-1. A160599

Expansion of (1+x²)*(1+x⁵)/( ∏_j=1..7 (1-x^j) ). A60962

Diagonal sums of Riordan array (1-x-x²,x(1-x)). A109266

Numbers n such that sigma₃(n) is divisible by square of cototient of n, while n is not a prime number. A91286

Sum of all n-digit Padovan numbers. A130450

Numbers k such that 2^k-1+2·k-1 is a prime number. A192764

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 494", based on the 5-celled von Neumann neighborhood. A272548