Properties of the Number 28818

Twenty-Eight Thousand Eight Hundred Eighteen

Basics

Value: 28817 → 28818 → 28819

Parity: even

Prime: No

Previous Prime: 28817

Next Prime: 28837

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ² × 1601

Divisors: 1, 2, 3, 6, 9, 18, 1601, 3202, 4803, 9606

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111000010010010

Octal: 70222

Duodecimal: 14816

Hexadecimal: 7092

Square: 830477124

Square Root: 169.7586522095413

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

Array read by antidiagonals: T(n,k) is the number of series-reduced rooted trees with n leaves of k colors. A319254

Number of endless self-avoiding walks of length 2·n for the honeycomb lattice. A334330

Number of permutations in S_n+2 containing an increasing subsequence of length n. A217200

Number of rooted gene trees with n leaves on the label set [4]. A220824

Numbers·such that the base 10 representation of x² forms an arithmetic sequence when split into equal-sized chunks. A244660

Palindromic squares with odd number of digits and non-palindromic and "non-core" square roots. A28818

Number of (n+2)X5 binary arrays avoiding patterns 001 and 010 in rows, columns and nw-to-se diagonals. A202893

Number of n X 3 0..1 arrays with no 1 equal to more than two of its horizontal and vertical neighbors, with the exception of exactly two elements. A283227