Properties of the Number -1810

Eight Hundred Ten

Basics

Value: -1811 → -1810 → -1809

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 2 × 5 × 181

Divisors: 1, 2, 5, 10, 181, 362, 905, 1810

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11100010010

Octal: -3422

Duodecimal: -106A

Hexadecimal: -712

Square: 3276100

Square Root: 42.5440947723653

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

Expansion of η(q)⁵ * η(q³) * η(q⁶)⁴ / η(q²)⁴ in powers of q. A214262

a(n) = ∑_{d divides n} (-1)^{d + n/d} * d². A321558

Minimal determinant of an n X n Toeplitz matrix using the integers 1 to 2·n - 1. A350930

Expansion of (9*φ(q)*φ(q³)⁵ - φ(q)⁵*φ(q³))/8 in powers of q where φ(q) is a Ramanujan θ function. A113261

a(n) is the minimal determinant of an n X n Hankel matrix using the integers 1 to 2·n - 1. A368351

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

McKay-Thompson series of class 30a for Monster. A58619

a(n) = sigma₂(n): sum of squares of divisors of n. A1157

Number of knapsack partitions of n. A108917

a(n) = ∑_{k = 0..n} binomial(n,k)⁴. A5260