Properties of the Number -828

Eight Hundred Twenty-Eight

Basics

Value: -829 → -828 → -827

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: Yes

Factorization: 2 ² × 3 ² × 23

Divisors: 1, 2, 3, 4, 6, 9, 12, 18, 23, 36

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -1100111100

Octal: -1474

Duodecimal: -590

Hexadecimal: -33c

Square: 685584

Square Root: 28.77498913987632

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) = n! * [xⁿ] 1/(1 - n + exp(x)*(exp(n·x) - 1)/(exp(x) - 1)). A319509

Expansion of (f(x) / f(x³))⁶ in powers of·where f() is a Ramanujan θ function. A132107

Expansion of q^1/4 * (η(q) / η(q³))³ in powers of q. A199659

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 646", based on the 5-celled von Neumann neighborhood. A273329

Imaginary part of (5+12i)ⁿ. A67358

Expansion of 1/(theta₃(q) * theta₃(q²) * theta₃(q³)), where theta₃() is the Jacobi θ function. A320070

Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of the symmetric matrix A202871; by antidiagonals. A202872

E.g.f. satisfies A(x)^A(x²) = 1/(1 - x·A(x)). A355767

Expansion of (1/x) * Series_Reversion( x * (1+x²/(1-x))³ ). A369078

Expansion of e.g.f.: exp(sec(x)-exp(x))=1-x+1/2!*x²-2/3!*x³+9/4!*x⁴-32/5!*x⁵... A13501