Properties of the Number -2188

One Hundred Eighty-Eight

Basics

Value: -2189 → -2188 → -2187

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 547

Divisors: 1, 2, 4, 547, 1094, 2188

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100010001100

Octal: -4214

Duodecimal: -1324

Hexadecimal: -88c

Square: 4787344

Square Root: 46.776062254106

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

Expansion of (1+x+sqrt(1-2x-3x²))/2. A168051

Expansion of (1 - x + sqrt(1 - 2·x - 3·x²))/2 in powers of x. A292440

G.f.: ∏_k>=1 (1-prime(k)*x^prime(k)). A298159

Matrix inverse of triangle A099602, read by rows, where row n of A099602 equals the inverse binomial transform of column n of the triangle of trinomial coefficients (A027907). A104495

Square array T(n,k), n >= 1, k >= 0, read by antidiagonals downwards, where T(n,k) = ∑_d∣n μ(d)*μ(n/d)*d^k. A347227

Motzkin numbers: number of ways of drawing any number of nonintersecting chords joining n (labeled) points on a circle. A1006

a(n) = 3ⁿ + 1. A34472

Triangle T(n,k), 0 <= k <= n, read by rows, defined by: T(0,0)=1, T(n,k)=0 if n < k, T(n,k) = T(n-1,k-1) + T(n-1,k) + T(n-1,k+1). A64189

Motzkin triangle, T, read by rows; T(0,0) = T(1,0) = T(1,1) = 1; for n >= 2, T(n,0) = 1, T(n,k) = T(n-1,k-2) + T(n-1,k-1) + T(n-1,k) for k = 1,2,...,n-1 and T(n,n) = T(n-1,n-2) + T(n-1,n-1). A26300

Third spoke of a hexagonal spiral. A56107