Properties of the Number -2040

Forty

Basics

Value: -2041 → -2040 → -2039

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 6

Digital Root: 6

Palindrome: No

Factorization: 2 ³ × 3 × 5 × 17

Divisors: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -11111111000

Octal: -3770

Duodecimal: -1220

Hexadecimal: -7f8

Square: 4161600

Square Root: 45.16635916254486

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 (Gaussian) q-binomial coefficients for q = -13. A15129

Gaussian binomial coefficient [ n,3 ] for q = -13. A15286

Coefficients for rewriting generalized falling factorials into ordinary falling factorials. A136656

G.f.: ∑_n>=0 xⁿ * (xⁿ + i)ⁿ / (1 + i·xⁿ⁺¹)ⁿ⁺¹, where i² = -1. A323675

q-integers for q=-13. A15000

Expansion of q / (χ(q) * χ(q²) * χ(q³) * χ(q⁶))² in powers of q where χ() is a Ramanujan θ function. A212770

Square array A(n,k), n >= 0, k >= 1, read by antidiagonals: A(n,k) = n! * [xⁿ] (1 + k·x)^n/k. A384216

Expansion of (8 / 7) * (1 - η(q)⁷ / η(q⁷)) - 7 * (η(q) * η(q⁷))³ in powers of q. A138810

a(n) = 4*( 1-(-1)ⁿ) -2ⁿ. A166978

Table T(n,k), n >= 0, k = 1..2ⁿ, read by rows, giving coefficients of iterations of polynomial x²-x: see Comments for precise definition. A273894