Properties of the Number 28646

Twenty-Eight Thousand Six Hundred Forty-Six

Basics

Value: 28645 → 28646 → 28647

Parity: even

Prime: No

Previous Prime: 28643

Next Prime: 28649

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 × 14323

Divisors: 1, 2, 14323, 28646

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111111100110

Octal: 67746

Duodecimal: 146B2

Hexadecimal: 6fe6

Square: 820593316

Square Root: 169.25129246183025

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 strict partitions of 2n that include a partition of n. A237258

Number of binary vectors of length n+1 beginning with 0 and containing just 1 singleton. A6367

Numbers k such that ∑_i=1..k i⁶ divides ∏_i=1..k i⁶. A166606

Semiprimes in A054552. A113690

a(n) = Fibonacci(2n + 1) - n. A280523

The number of edges inside a cross with width 3 and height n (see Comments in A331455 for definition) formed by the straight line segments mutually connecting all vertices and all points. A330851

a(0) = a(1) = 1; for n>1, a(n) = a(n-1) + a(n-2) + floor(n/2). A215004

Number of (w,x,y,z) with all terms in {0,...,n} and |w-x|+|x-y+|y-z|=n. A212904

Number of distinct coefficients in expansion related to enumeration of permutations of length n by length of longest subsequence. A68604

a(1)=2. For n >=2, a(n) = the least integer >= a(n-1) that is not coprime to both a(n-1)+1 and a(n-1). A140525