Properties of the Number -626

Six Hundred Twenty-Six

Basics

Value: -627 → -626 → -625

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 14

Digital Root: 5

Palindrome: Yes

Factorization: 2 × 313

Divisors: 1, 2, 313, 626

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1001110010

Octal: -1162

Duodecimal: -442

Hexadecimal: -272

Square: 391876

Square Root: 25.019992006393608

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) = (-11·n⁵ + 145·n⁴ - 635·n³ + 1115·n² - 494·n + 120)/120. A161706

Expansion of ∏_{m >= 1} (1 + q^m)^-2. A22597

a(n) = ∑_k=0..n k^p*q^k, where p=1, q=-2. A232600

a(n) = nearest integer to n² * sin(sqrt(n)). A274088

Take alternate terms of A274088 and A274090. A274091

Dirichlet inverse of sigma₄ function (A001159). A53826

Expansion of ∑_k>0 x^2·k/(1+x^k)³. A363022

T(j,k) are the numerators u in the representation R = s/t + (2/π)*u/v of the resistance between two nodes separated by the distance vector (j,k) in an infinite square lattice of one-ohm resistors, where T(j,k), j >= 0, 0 <= k <= j, is a triangle read by rows. A355566

Expansion of q * φ(-q²) * ψ(q⁹) / (f(q³) * φ(q³)) in powers of q where f(), φ(), ψ() are Ramanujan θ functions. A233670

Expansion of (1 - 2·x²)/(1 + x)³. Second column of Riordan triangle A248156. A248158