Properties of the Number 28191

Twenty-Eight Thousand One Hundred Ninety-One

Basics

Value: 28190 → 28191 → 28192

Parity: odd

Prime: No

Previous Prime: 28183

Next Prime: 28201

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 9397

Divisors: 1, 3, 9397, 28191

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111000011111

Octal: 67037

Duodecimal: 14393

Hexadecimal: 6e1f

Square: 794732481

Square Root: 167.9017569890202

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

Expansion of ∏_k>=1 (1 + x^2·k-1)^k*(3·k-2)*(1 + x^2·k)^k*(3·k+2). A294841

Triangle read by rows: T(n,k) is the number of k-matchings in the P₃ X P_n lattice graph. A100245

Fibonacci sequence beginning 14, 9. A206641

Number of n X 2 arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 n X 2 array. A219846

Square table defined by T(n,k) = ∑_{m=k(k+1)/2..k(k+1)/2+k} [x^m] S(x)ⁿ for n>=1, k>=0, where S(x) = ∑_n>=0 x⁽ⁿ⁺¹(n+2)/2-1), as read by antidiagonals. A162424

Expansion of 1/((1-5x)(1-8x)(1-9x)(1-11x)). A28191