Properties of the Number 28786

Twenty-Eight Thousand Seven Hundred Eighty-Six

Basics

Value: 28785 → 28786 → 28787

Parity: even

Prime: No

Previous Prime: 28771

Next Prime: 28789

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 2 × 37 × 389

Divisors: 1, 2, 37, 74, 389, 778, 14393, 28786

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111000001110010

Octal: 70162

Duodecimal: 147AA

Hexadecimal: 7072

Square: 828633796

Square Root: 169.66437457521835

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) = coefficient of xⁿ in A(x) such that x² = ∑_n=-oo..+oo x^n*(3·n+1/2) * (A(x)^3·n - 1/A(x)^3·n+1). A359919

Number of (w,x,y) with all terms in {0,...,n} and the numbers w,x,y,|w-x|,|x-y| distinct. A213490

Number of maximal irredundant sets in the n-web graph. A291105

Numbers k such that the continued fraction for sqrt(k) has period 81. A20420

Number of simple labeled graphs G on n vertices such that for each k in {1,2,...,n}, G has exactly k connected components and the vertices labeled with {1,2,...,k} are all in different components. A275597

Number of possible outcomes after n steps of the Zeno gambling process. A137414

Smallest number that is the area of n distinct Pythagorean triangles. A55193

Irregular table read by rows: T(n,k) is the number of k-sided regions, k>=3, in a graph of n adjacent rectangles in a row with all possible diagonals drawn, as in A306302, but without the rectangles' edges which are perpendicular to the row. A369178

G.f. satisfies: x = A(x) - A(A(x))² - A(A(A(x)))³. A177395

Numbers n such that there are five distinct triples (k, k+n, k+2n) of squares. A214155