Properties of the Number -1998

Nine Hundred Ninety-Eight

Basics

Value: -1999 → -1998 → -1997

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ³ × 37

Divisors: 1, 2, 3, 6, 9, 18, 27, 37, 54, 74

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11111001110

Octal: -3716

Duodecimal: -11A6

Hexadecimal: -7ce

Square: 3992004

Square Root: 44.69899327725402

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

Coefficients in expansion of (E₆²/E₄³)^1/96. A296614

Expansion of f(x³, x³) * f(x, x⁵) / f(x, x)² in powers of·where f(,) is Ramanujan's general θ function. A261325

Expansion of (c(q²)/c(q))³ in powers of q where c() is a cubic AGM θ function. A123633

Expansion of ψ(q) * ψ(q²) * ψ(q⁶) / ψ(q³)³ in powers of q where ψ() is a Ramanujan θ function. A213265

Expansion of q * (ψ(q) / ψ(q²)) / (ψ(q³) / ψ(q⁶))³ in powers of q where ψ() is a Ramanujan θ function. A187153

Expansion of q * φ(-q²) * ψ(q⁹) / (f(q³) * φ(q³)) in powers of q where f(), φ(), ψ() are Ramanujan θ functions. A233670

Expansion of 3 * (b(q²)² / b(q)) / (c(q)² / c(q²)) in powers of q where b(), c() are cubic AGM θ functions. A128636

Expansion of ∏_{i>0, j>0, k>0} (1 - x^{i² + j² + k²}). A321432

Expansion of f(-x²)² * f(-x, x²) / f(x³)³ in powers of·where f(,) is Ramanujan's general θ function. A254525

Expansion of f(-x², -x⁴)² / (f(x³, -x⁶) * f(-x, x²)) in powers of·where f(,) is Ramanujan's general θ function. A261326