Properties of the Number -520

Five Hundred Twenty

Basics

Value: -521 → -520 → -519

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 7

Digital Root: 7

Palindrome: No

Factorization: 2 ³ × 5 × 13

Divisors: 1, 2, 4, 5, 8, 10, 13, 20, 26, 40

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1000001000

Octal: -1010

Duodecimal: -374

Hexadecimal: -208

Square: 270400

Square Root: 22.80350850198276

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 Product (1 - x^k)⁸ in powers of x. A731

Inverse Euler transform of the unsigned Moebius function A008966. A320782

Expansion of q^-1/3 * (η(q)⁸ + 8 * η(q⁴)⁸) in powers of q². A153728

Sum of the inverse permutation of EKG-sequence, A064664, and its Dirichlet inverse, A323411. A323412

E.g.f. of sin(arcsinh(x)) (odd powers only). A101927

Expansion of E(k) * K(k) * (2/π)² in powers of q² where E(), K() are complete elliptic integrals and the nome q = exp( -π * K(k') / K(k)). A122858

Triangular array, inverse of 2·P - I, where P is Pascal's triangle and I is the identity matrix. A162312

a(n) = ∑_k=1..n (-1)^k*k²*floor(n/k). A366915

Expansion of q^-1/3 * (η(q)⁸ + 32 * η(q⁴)⁸) in powers of q. A153729

a(n) = Fibonacci(n) * ∑_d∣n -(-1)^n/d / Fibonacci(d). A203802