Properties of the Number -6886

Eight Hundred Eighty-Six

Basics

Value: -6887 → -6886 → -6885

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 28

Digital Root: 1

Palindrome: Yes

Factorization: 2 × 11 × 313

Divisors: 1, 2, 11, 22, 313, 626, 3443, 6886

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1101011100110

Octal: -15346

Duodecimal: -3B9A

Hexadecimal: -1ae6

Square: 47416996

Square Root: 82.98192574289898

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

G.f. A(x,y) satisfies: ∑_n=-oo...+oo (xⁿ + y)ⁿ = exp( (1-y) * A(x,y) ) / (1-y), where A(x,y) = ∑_n>=1 xⁿ/n·Sum{k=0..n-1} T(n,k)*y^k, written here as a flattened triangle of coefficients T(n,k) read by rows. A321600

a(n) = ∑_{k=0..floor(n/4)} (-1)^k * binomial(n-1-3·k,n-4·k) * binomial(2·k,k). A360315

Expansion of 1/((1-x)*(1+x+2·x²-x³)). A77911

Palindromic in bases 9 and 10. A29965

Palindromic in bases 10 and 32. A99165

Numbers n such that Bernoulli number B_n has denominator 138. A271635

Sum of cubes of primes dividing n. A5064

Numbers palindromic in bases 10 and 25. A250410

Sums of two distinct prime cubes. A120398

Second 9-gonal (or nonagonal) numbers: a(n) = n*(7·n+5)/2. A179986