Properties of the Number 28919

Twenty-Eight Thousand Nine Hundred Nineteen

Basics

Value: 28918 → 28919 → 28920

Parity: odd

Prime: No

Previous Prime: 28909

Next Prime: 28921

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 11 ² × 239

Divisors: 1, 11, 121, 239, 2629, 28919

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111000011110111

Octal: 70367

Duodecimal: 1489B

Hexadecimal: 70f7

Square: 836308561

Square Root: 170.05587317114336

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

Numbers k such that sopf(k) + 1 = sopf(k+1), where sopf(k) = A008472(k). A64111

Frobenius number of the numerical semigroup generated by four consecutive tetrahedral numbers. A69761

Composite numbers k such that φ(k) * ψ(k) + 1 is a perfect square, where φ is the Euler totient function (A000010) and ψ is the Dedekind ψ function (A001615). A309653

Decimal expansion of π/(2e). A86056

Congruent to 0, 6, 10, 12 (mod 14). A28919