Properties of the Number 28908

Twenty-Eight Thousand Nine Hundred Eight

Basics

Value: 28907 → 28908 → 28909

Parity: even

Prime: No

Previous Prime: 28901

Next Prime: 28909

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 ² × 3 ² × 11 × 73

Divisors: 1, 2, 3, 4, 6, 9, 11, 12, 18, 22

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111000011101100

Octal: 70354

Duodecimal: 14890

Hexadecimal: 70ec

Square: 835672464

Square Root: 170.02352778365704

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 connected graphs with n nodes and n+1 edges. A1435

Triangle of coefficients of polynomials v(n,x) jointly generated with A208765; see the Formula section. A208766

Values of n such that n^a-+a are primes, a=5. A155021

Nonnegative values·of solutions (x, y) to the Diophantine equation x² + (x+511)² = y². A207078

a(n) = 3*(n+1)*(9·n+4). A304503

Generalized sum of divisors function: third diagonal of A060044. A60045

Partial sums of ceiling(Fibonacci(n)/11). A179053

Triangle read by rows: number of P-graphs by number of edges and number of non-root nodes. A11268

Expansion of g.f.: (1+x+12·x²-8·x³)/(1-5·x-30·x²+69·x³+31·x⁴-22·x⁵). A177468

a(n) is the optimal wire-length for an n X n grid. A195647