Properties of the Number -1850

Eight Hundred Fifty

Basics

Value: -1851 → -1850 → -1849

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 × 5 ² × 37

Divisors: 1, 2, 5, 10, 25, 37, 50, 74, 185, 370

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11100111010

Octal: -3472

Duodecimal: -10A2

Hexadecimal: -73a

Square: 3422500

Square Root: 43.01162633521314

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

Dirichlet inverse of sigma₂ function (A001157). A53822

Expansion of ψ(x)² * φ(-x)⁶ in powers of·where φ(), ψ() are Ramanujan θ functions. A227695

Dirichlet g.f.: ζ(2·s) / (ζ(s) * ζ(s-2)). A328639

a(1) = 1; a(n) = -∑_{d∣n, d < n} A341512(n/d) * a(d), where A341512(n) = σ(n)*A003961(n) - n*σ(A003961(n)). A347096

McKay-Thompson series of class 30C for Monster. A58614

Expansion of (1/3) * b(q) * b(q²) * c(q)² / c(q²) in powers of q where b(), c() are cubic AGM functions. A132000

Partition function coefficients for square lattice spin 5/2 Ising model. A10109

Coefficient array for powers of x² of polynomials appearing in a generalized Melham conjecture on alternating sums of fifth powers of Chebyshev S polynomials with odd indices. A220671

Expansion of x/(1+x-x³-x⁵-x⁶-x⁷-x⁹+x¹¹+x¹²). A143606

a(n) = n² + 1. A2522