Properties of the Number 27785

Twenty-Seven Thousand Seven Hundred Eighty-Five

Basics

Value: 27784 → 27785 → 27786

Parity: odd

Prime: No

Previous Prime: 27779

Next Prime: 27791

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 5 × 5557

Divisors: 1, 5, 5557, 27785

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110110010001001

Octal: 66211

Duodecimal: 140B5

Hexadecimal: 6c89

Square: 772006225

Square Root: 166.68833192518306

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

Composite numbers whose prime factors contain no digits other than 5 and 7. A36320

a(n) = T(0,n)+T(1,n-1)+...+T(n,0), array T given by A048505. A48514

Numbers k such that the continued fraction for sqrt(k) has period 63. A20402

Number of partitions satisfying cn(2,5) <= cn(1,5) + cn(4,5) and cn(3,5) <= cn(1,5) + cn(4,5). A39891

Number of ways to tile an n X n X n triangular area with six 2 X 2 X 2 triangular tiles and an appropriate number (= n²-24) of 1 X 1 X 1 tiles. A286441

a(n) = 6*(n+1)*binomial(n+2,12). A27785