Properties of the Number -1808

Eight Hundred Eight

Basics

Value: -1809 → -1808 → -1807

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 ⁴ × 113

Divisors: 1, 2, 4, 8, 16, 113, 226, 452, 904, 1808

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: -11100010000

Octal: -3420

Duodecimal: -1068

Hexadecimal: -710

Square: 3268864

Square Root: 42.5205832509386

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 1/(1 + ∑_i>=1 q^i²/∏_j=1..i (1 + q^2·j)). A294408

Alternating row sums of A066448. A350310

Expansion of ∏_j>=1 (1 - x^j)/(1 - x^3·j)³. A286952

G.f.: ∑_n>=0 a(n)*xⁿ/(n!*3^n*(n-1/2)) = log( ∑_n>=0 xⁿ/(n!*3^n*(n-1/2)) ). A355070

a(n) = n² + n + 2. A14206

Coordination sequence for "ubt" 3D uniform tiling. A299291

Numbers which are the sum of 3 nonzero 4th powers. A3337

Product of the 4th power of a prime (A030514) and a different prime (p⁴*q). A178739

Number of partitions of n into Fibonacci parts (with a single type of 1). A3107

G.f. A(x,y) satisfies: A( x - y·A(x,y)², y) = x + (1-y)*A(x,y)², where the coefficients T(n,k) of xⁿ*y^k form a triangle read by rows n>=1, for k=0..n-1. A277295