Properties of the Number 28086

Twenty-Eight Thousand Eighty-Six

Basics

Value: 28085 → 28086 → 28087

Parity: even

Prime: No

Previous Prime: 28081

Next Prime: 28087

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 31 × 151

Divisors: 1, 2, 3, 6, 31, 62, 93, 151, 186, 302

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110110110110110

Octal: 66666

Duodecimal: 14306

Hexadecimal: 6db6

Square: 788823396

Square Root: 167.58878244083044

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

T(n,k)=1/729 the number of (n+2)X(k+2) 0..2 arrays with no 3X3 subblock trace equal to any horizontal or vertical neighbor 3X3 subblock trace. A185891

Base-2 digits are, in order, the first n terms of the periodic sequence with initial period [1,1,0]. A33129

Numbers that are repdigits in base 8. A48333

a(n) = 6*(8ⁿ - 1)/7. A125837

Numbers having in binary representation exactly two ones in three consecutive digits. A173593

a(n) = ceiling(24(2ⁿ-1)/n). A3177

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 190", based on the 5-celled von Neumann neighborhood. A270683

Fixed points of A341915. A341943

Triangle T(n,k) in which the n-th row encodes the inverse of a 3n X 3n Jacobi matrix, with 1's on the lower, main, and upper diagonals in GF(2), where the encoding consists of the decimal representations for the binary rows (n >= 1, 1 <= k <= 3n). A363146

Numbers whose binary expansion consists of alternating runs of 1's and 0's where each run of 0's is exactly one shorter than the preceding run of 1's, and the expansion ends with a 0-run. A387270