Properties of the Number -6885

Eight Hundred Eighty-Five

Basics

Value: -6886 → -6885 → -6884

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ⁴ × 5 × 17

Divisors: 1, 3, 5, 9, 15, 17, 27, 45, 51, 81

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1101011100101

Octal: -15345

Duodecimal: -3B99

Hexadecimal: -1ae5

Square: 47403225

Square Root: 82.97590011563598

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

Triangle of signed numbers used for the computation of the column sequences of triangle A090215. A89515

Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of f(i,j)=min(3i-2,3j-2) (A204028). A204029

Coefficients in the expansion of 1/([r] + [2r]x + [3r]x² + ...); [ ] = floor, r = 5/4. A279677

a(n) = ∑_{k=0..floor(n/10)} (-1)^k * binomial(n-5·k,5·k). A348310

a(n) = ∑_k=0..5 binomial(n,k). A6261

a(n) = (2·n+5)*(2·n+1). A78371

Row sums of A159841. A160906

Numbers k for which nontrivial positive magic squares of exactly 8 different orders with magic sum k exist. For a definition of nontrivial positive magic squares, see A125005. A125015

Reverse and add (in binary) - written in base 10. A35522

Values of n such that there are exactly 10 solutions to x² - y² = n with x > y >= 0. A257417