Properties of the Number 27841

Twenty-Seven Thousand Eight Hundred Forty-One

Basics

Value: 27840 → 27841 → 27842

Parity: odd

Prime: No

Previous Prime: 27827

Next Prime: 27847

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 11 × 2531

Divisors: 1, 11, 2531, 27841

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110110011000001

Octal: 66301

Duodecimal: 14141

Hexadecimal: 6cc1

Square: 775121281

Square Root: 166.8562255356389

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

Maximal number of regions obtained by joining n points around a circle by straight lines. Also number of regions in 4-space formed by n-1 hyperplanes. A127

Numbers n such that (nⁿ-2)/(n-2) is an integer. A242787

Positive integers of the form (10·m²+1)/11. A179338

a(n) = ∑_{1 <= x₁, x₂, x₃ <= n} gcd(x₁, n)/gcd(x₁, x₂, x₃, n). A373060

a(n) = n³ + (1-n)². A168297

Starting positions of strings of three 6's in the decimal expansion of π. A83625

Indices of primes in sequence defined by A(0) = 39, A(n) = 10·A(n-1) - 1 for n > 0. A101847

Maximum number of odd 2 X 2 submatrices over all 2n X 2n (0,1) matrices. A93699

Sum of the squares of the first n nonsquarefree numbers (A013929). A111732

Number of subgroups of index n in fundamental group of a certain fiber space. A27841