Properties of the Number 28187

Twenty-Eight Thousand One Hundred Eighty-Seven

Basics

Value: 28186 → 28187 → 28188

Parity: odd

Prime: No

Previous Prime: 28183

Next Prime: 28201

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 71 × 397

Divisors: 1, 71, 397, 28187

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111000011011

Octal: 67033

Duodecimal: 1438B

Hexadecimal: 6e1b

Square: 794506969

Square Root: 167.88984483881092

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 integer partitions of n whose mean is not an integer. A349156

Total number of distinct numbers that can be obtained by starting with 1 and applying the "Choix de Bruxelles", version 2 (A323460) operation at most n times. A323289

Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 286", based on the 5-celled von Neumann neighborhood. A280563

Collatz trajectory starting at 3711. A179623

Total number of parts of multiplicity 4 in all partitions of n. A222704

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 23 ones. A31791

G.f. (x + 1)¹⁰/(x¹⁰ + x⁹ - x⁷ - x⁶ - x⁵ - x⁴ - x³ + x + 1). A173243

Numbers k such that σ(φ(k))/k > σ(φ(m))/m for all m < k, where σ is the sum of divisors function (A000203) and φ is Euler's totient function (A000010). A293059

Expansion of 1 / ((1-x)⁴ - x⁵)². A392638

Expansion of 1/((1-5x)(1-7x)(1-10x)(1-11x)). A28187