Properties of the Number -818

Eight Hundred Eighteen

Basics

Value: -819 → -818 → -817

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 17

Digital Root: 8

Palindrome: Yes

Factorization: 2 × 409

Divisors: 1, 2, 409, 818

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1100110010

Octal: -1462

Duodecimal: -582

Hexadecimal: -332

Square: 669124

Square Root: 28.600699292150182

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

a(n) = 1 + 3·n - 2·n². A168244

Expansion of (∏_k>0 theta₄(q^k)/theta₃(q^k))^1/2, where theta₃() and theta₄() are the Jacobi θ functions. A320992

Expansion of c(-q) * c(-q³) / c(q²)² in powers of q where c() is a cubic AGM θ function. A164616

Triangle of the numerators of coefficients c(n,k) = [x^k] P(n,x) of some polynomials P(n,x). A141904

Expansion of f(x, x⁵) * f(-x⁶) / f(x)² in powers of·where f() is a Ramanujan θ function. A254346

a(n) = (6-(-4)ⁿ)/5. A166114

Expansion of ∏_k>=1 (1 - x^k)^k/(1 - x^4·k)^4·k. A285284

McKay-Thompson series of class 40d for the Monster group. A112182

Expansion of c(q³) / (c(q³) + c(q⁶)) where c() is a cubic AGM function. A145977

Numerator of Hermite(n, 4/21). A159707