Properties of the Number 27780

Twenty-Seven Thousand Seven Hundred Eighty

Basics

Value: 27779 → 27780 → 27781

Parity: even

Prime: No

Previous Prime: 27779

Next Prime: 27791

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 ² × 3 × 5 × 463

Divisors: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110110010000100

Octal: 66204

Duodecimal: 140B0

Hexadecimal: 6c84

Square: 771728400

Square Root: 166.67333320000535

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 compositions of grid graph G_3,n = P₃ X P_n. A108808

a(n) = (3·C(4p,p) - 20·C(3p,p) + 54·C(2p,p) - 60) / p⁷, where p = prime(n). A268590

Table of number of partitions of an m X n rectangle, read by descending antidiagonals. A110476

a(n) = the maximum number of distinct tilings of a polyomino of size n using any combination of polyomino tiles of sizes 1 through n. A367173

Triangle of coefficients of polynomials v(n,x) jointly generated with A208932; see the Formula section. A208932

Numbers k such that k!!!! - 1 is prime. A85147

Number of compositions of the grid graph G_4,n. A221157

a(n) = -a(n-1) + 2·a(n-2) + a(n-3), a(0) = -1, a(1) = -2, a(2) = 3. A321175

Multiples of 1852. A303272

Records in A009101. A354710