Properties of the Number 16858

Sixteen Thousand Eight Hundred Fifty-Eight

Basics

Value: 16857 → 16858 → 16859

Parity: even

Prime: No

Previous Prime: 16843

Next Prime: 16871

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 2 × 8429

Divisors: 1, 2, 8429, 16858

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100000111011010

Octal: 40732

Duodecimal: 990A

Hexadecimal: 41da

Square: 284192164

Square Root: 129.83836104942176

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 partitions of n having no parts with multiplicity 3. A118807

The number of regions inside a nonagon formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts. A332421

This is to A139025 as A139025 to A014688, see A139025 for details. A139026

Table read by antidiagonals: Place k equally spaced points on each side of a regular n-gon and join every pair of the n*(k+1) boundary points by a chord; T(n,k) (n >= 3, k >= 0) gives the number of regions in the resulting planar graph. A367323

Consider a number of k digits n = d_k*10^k-1 + d_k-1*10^k-2 + … + d₂*10 + d₁. Sequence lists the numbers n such that ∑_i=1..k-1{σ(∑_j=1..i{d_j*10^j-1})} = ∑_i=1..k-1{φ(∑_j=1..i{d_k-j+1*10^i-j})} (see example below). A244068

Polynomial extrapolation of 2, 3, 5, 7, 11. A61165

Length of shortest prefix of the Kolakoski sequence K (A000002) containing all blocks of length n that appear in K. A283511

Number of (binary) max-heaps on n elements from the set {0,1} containing exactly eight 0's. A326509

Expansion of 1/( 1 - 4 * ∑_k>=0 x^{3^k} / (1 - x^{3^k}) )^1/2. A382368

Number of alkyls S C_n+4 H_2n+4 with n carbon atoms. A650