Properties of the Number -864

Eight Hundred Sixty-Four

Basics

Value: -865 → -864 → -863

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ⁵ × 3 ³

Divisors: 1, 2, 3, 4, 6, 8, 9, 12, 16, 18

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1101100000

Octal: -1540

Duodecimal: -600

Hexadecimal: -360

Square: 746496

Square Root: 29.393876913398138

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: Yes

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

Coefficients in expansion of Eisenstein series E₂ (also called E₁ or G₂). A6352

Coefficients in expansion of (E₆²/E₄³)^1/2. A299413

Irregular triangle read by rows: mean version of Girard-Waring formula A210258, for m = 3 data values. A287768

a(n) is the determinant of the 3 X 3 matrix with entries the 9 consecutive primes starting with the n-th prime. A117330

Matrix log of triangle A111825, which shifts columns left and up under matrix 6th power; these terms are the result of multiplying each element in row n and column k by (n-k)!. A111828

Expansion of η(q)⁶ * η(q²) / η(q⁴)² in powers of q. A245643

Expansion of ∏_k>0 ((1-x^5k-2) * (1-x^5k-3)/((1-x^5k-1) * (1-x^5k-4)))² in powers of x. A285442

a(n) = coefficient of xⁿ*yⁿ in ∏_n>=1 (1 - (xⁿ + yⁿ)). A322213

Triangular table containing values of coefficients of the characteristic polynomial of a certain n·n circulant matrix, read by rows. A127412

a(n) = Fibonacci(n)*A122859(n) for n>=1, with a(0)=1, where A122859 lists the coefficients in φ(-q)³/φ(-q³) and φ() is a Ramanujan θ function. A205972