Properties of the Number 28168

Twenty-Eight Thousand One Hundred Sixty-Eight

Basics

Value: 28167 → 28168 → 28169

Parity: even

Prime: No

Previous Prime: 28163

Next Prime: 28181

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 ³ × 7 × 503

Divisors: 1, 2, 4, 7, 8, 14, 28, 56, 503, 1006

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 110111000001000

Octal: 67010

Duodecimal: 14374

Hexadecimal: 6e08

Square: 793436224

Square Root: 167.833250579258

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) is the concatenation of n and 6n. A9440

Numbers k such that k²+k+5 is a palindrome. A27718

G.f.: ∏_{k>=1, j>=1} 1/(1 - x^j·k³). A280661

Number of (w,x,y,z) with all terms in {1,...,n} and w >= |x-y| + |y-z|. A212675

Primitive values n such that the square with opposite corners (0,0) and (n,n) contains a point (x,y) with integer coordinates, with 0 < x,y < n, at an integer distance from three of the four corners. A260549

a(n) = 36·n² - 2·n. A158062

Primitive integer length of the side of an origin-centered square that contains inside its boundary a point with integer coordinates that is an integer distance from three of the four corners. A215365

Number of (n+2)X(5+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the central row and column plus the two sums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally. A259003

Number of permutations p of [n] such that | |p(i) - p(i-1)| - |p(i+1) - p(i)| | = 1. A338766

T(n,k) = Number of isosceles right triangles on a (n+1) X (k+1) grid. A189895