Properties of the Number -2004

Four

Basics

Value: -2005 → -2004 → -2003

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 6

Digital Root: 6

Palindrome: No

Factorization: 2 ² × 3 × 167

Divisors: 1, 2, 3, 4, 6, 12, 167, 334, 501, 668

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11111010100

Octal: -3724

Duodecimal: -11B0

Hexadecimal: -7d4

Square: 4016016

Square Root: 44.76605857119878

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

G.f. A(x) satisfies: A(x)² + A(-x)² = 2 and A(x)^-2 - A(-x)^-2 = -8·x. A193618

Reversion of Pell numbers A000129(n+1). A104565

Expansion of ∏_k>=1 ((1 - x)^k - x^k)/((1 - x)^k + x^k). A307520

Expansion of ( 1 + 9 * ∑_k>=0 x^{2^k}/(1 - x^{2^k})² )^1/3. A382336

Numerator of Hermite(n, 3/5). A158965

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 155", based on the 5-celled von Neumann neighborhood. A270328

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 419", based on the 5-celled von Neumann neighborhood. A272048

Expansion of 1/(∑_k>=0 x^k²)². A363774

Partial sums of A299258. A299264

Triangle read by rows: T(n,k) = number of unlabeled graphs with n nodes and connectivity exactly k (n>=1, 0<=k<=n-1). A259862