Properties of the Number 28691

Twenty-Eight Thousand Six Hundred Ninety-One

Basics

Value: 28690 → 28691 → 28692

Parity: odd

Prime: No

Previous Prime: 28687

Next Prime: 28697

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 13 × 2207

Divisors: 1, 13, 2207, 28691

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111000000010011

Octal: 70023

Duodecimal: 1472B

Hexadecimal: 7013

Square: 823173481

Square Root: 169.38417871808454

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

a(n) = ceiling(n*φ¹⁶), where φ is the golden ratio, A001622. A4971

Numerators of continued fraction convergents to sqrt(331). A41624

Number of dominating sets in the n-pan graph. A303005

Number of series-reduced planted trees with n+9 nodes and 4 internal nodes. A1860

a(n) = round(n*φ¹⁶), where φ is the golden ratio, A001622. A4951

Integer averages of first n Fibonacci numbers (beginning with F(0)). A266960

Least positive value of k for which the n-th sorted Galois number divides k!. A28691

Least number N such that the product n·N has the same digits as the concatenation (n,N) (counting repetitions), or 0 if no such number exists. A266578