Properties of the Number 1810

One Thousand Eight Hundred Ten

Basics

Value: 1809 → 1810 → 1811

Parity: even

Prime: No

Previous Prime: 1801

Next Prime: 1811

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

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

Number of non-isomorphic connected set-systems of weight n. A300913

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

Multiples of 10 containing a 10 in their decimal representation. A121030

Coordination sequence for (2,4,6) tiling of hyperbolic plane. A265061

a(n) = ∑_k=0..n C(n,k)ⁿ. A167010

a(n) = n²*∏_{distinct primes p dividing n} (1+1/p²). A65958

a(n) = n*(9·n + 1)/2. A22267