Properties of the Number -2186

One Hundred Eighty-Six

Basics

Value: -2187 → -2186 → -2185

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 × 1093

Divisors: 1, 2, 1093, 2186

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100010001010

Octal: -4212

Duodecimal: -1322

Hexadecimal: -88a

Square: 4778596

Square Root: 46.75467891024384

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

Square array A(n,k), n >= 1, k >= 0, read by antidiagonals: A(n,k) = ∑_{d∣n, d==1 (mod 4)} d^k - ∑_{d∣n, d==3 (mod 4)} d^k. A322143

McKay-Thompson series of class 24c for the Monster group. A62243

a(n) = 1 - n⁷. A24005

Triangle T(n, k) = c(n, q)/c(k, q) if k <= floor(n/2), otherwise c(n, q)/c(n-k, q), where c(n, q) = ∏_j=1..n (1 - q^j) and q = 3, read by rows. A174388

a(n) = ∑_{d∣n, d==1 mod 4} d⁷ - ∑_{d∣n, d==3 mod 4} d⁷. A321823

Expansion of q^-3/4 * η(q)² * η(q²)⁴ * η(q⁸)⁴ / η(q⁴)⁶ in powers of q. A135467

Square array A(n,k), n >= 1, k >= 0, read by antidiagonals: A(n,k) = ∏_{p∣n, p prime} (1 - p^k). A322324

Triangle read by rows: see DeTemple et al. reference for definition. A121871

Inverse binomial transform of the continued fraction expansion of e. A306810

a(n) = 3ⁿ - 1. A24023