Properties of the Number -11680

Eleven Thousand Six Hundred Eighty

Basics

Value: -11681 → -11680 → -11679

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ⁵ × 5 × 73

Divisors: 1, 2, 4, 5, 8, 10, 16, 20, 32, 40

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -10110110100000

Octal: -26640

Duodecimal: -6914

Hexadecimal: -2da0

Square: 136422400

Square Root: 108.07404868885037

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

The sequence 2^1-n*a(n) is fixed (up to signs) by Stirling2 transform. A3633

Triangle read by rows, numerators of coefficients (in rising powers) of rational polynomials P(n, x) such that Integral_x=0..1 P'(n, x) = BernoulliMedian(n). A291447

Numbers k such that φ(x) = k has exactly 11 solutions. A60674

Difference between larger and smaller terms of n-th amicable pair. A66539

Numbers n such that n = (a₁ + a₂ + ... + a_p)*(a₁³ + a₂³ + ... + a_p³), where n has the decimal expansion a_1a_2...a_p. A130680

Triangle of coefficients of polynomials defined by Binet form: P(n,x) = ((x+d)ⁿ + (x-d)ⁿ)/2, where d=sqrt(x+4). A162516

T(n,k)=Number of nXk 0..2 arrays with exactly floor(nXk/2) elements equal to at least one king-move neighbor, with new values introduced in row major 0..2 order. A223033

Number T(n,k) of sets of n words of length n over binary alphabet where the first letter occurs k times; triangle T(n,k), n>=0, n-signum(n)<=k<=n*(n-1)+signum(n), read by rows. A360693

a(n) = n·A033885(A003961(n)), where A033885(n) = 3·n-σ(n), and A003961 is fully multiplicative with a(p) = nextprime(p). A388977

Number of binary strings of length n having the minimum possible number of different antipower periods. A274449