Properties of the Number 28844

Twenty-Eight Thousand Eight Hundred Forty-Four

Basics

Value: 28843 → 28844 → 28845

Parity: even

Prime: No

Previous Prime: 28843

Next Prime: 28859

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 ² × 7211

Divisors: 1, 2, 4, 7211, 14422, 28844

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111000010101100

Octal: 70254

Duodecimal: 14838

Hexadecimal: 70ac

Square: 831976336

Square Root: 169.83521425193305

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 3-dimensional tilings of a 2 X 2 X n box using 1 X 1 X 1 cubes, 2 X 2 X 1 plates and trominos (L-shaped connection of 3 cubes). A360576

Number of (n+2) X 8 binary arrays with each 3 X 3 subblock having rows and columns in lexicographically nondecreasing order. A184545

Number of (n+2) X 9 binary arrays with each 3 X 3 subblock having rows and columns in lexicographically nondecreasing order. A184546

A256056(n)/2. A256055

T(n,k)=Number of (n+2)X(k+2) binary arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order. A184548

Row sums of triangle A013988. A28844

Hilltop maps: number of nX6 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..3 nX6 array. A218808

a(0) = 0; a(n+1) = ∑_{d a distinct decimal digit in a(n)} binomial(c(d)-1,2), where c(d) is the number of occurrences of d in a(j), 0 <= j <= n; see comments. A352610