Properties of the Number 28668

Twenty-Eight Thousand Six Hundred Sixty-Eight

Basics

Value: 28667 → 28668 → 28669

Parity: even

Prime: No

Previous Prime: 28663

Next Prime: 28669

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 2 ² × 3 × 2389

Divisors: 1, 2, 3, 4, 6, 12, 2389, 4778, 7167, 9556

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111111111100

Octal: 67774

Duodecimal: 14710

Hexadecimal: 6ffc

Square: 821854224

Square Root: 169.31627210637492

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

Partial sums of A243980. A244050

Number of maximal subsets of {1..n} such that every pair of distinct elements has a different quotient. A325861

T(n,k)=1/36 the number of (n+2)X(k+2) 0..2 arrays with each 3X3 subblock containing two of one value, two of another, and five of the last. A184457

Number of maximal subsets of {1..n} containing n such that every pair of distinct elements has a different quotient. A325869

Row sums of A053207. A53208

a(n) = A338268(k² + 2·n, k) for sufficiently large k. A338286

Number of 2 X 2 matrices with all elements in {0,1,...,n} and determinant >= 3n. A210368

1/36 the number of (n+2)X6 0..2 arrays with each 3X3 subblock containing two of one value, two of another, and five of the last. A184452

Partial sums of A200675. A200678

Convolution of (1,-1,2,-2,3,-3,...) and A000045 (Fibonacci numbers). A213043