Properties of the Number -728

Seven Hundred Twenty-Eight

Basics

Value: -729 → -728 → -727

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 ³ × 7 × 13

Divisors: 1, 2, 4, 7, 8, 13, 14, 26, 28, 52

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1011011000

Octal: -1330

Duodecimal: -508

Hexadecimal: -2d8

Square: 529984

Square Root: 26.981475126464083

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

Square array A(n,k), n >= 1, k >= 0, read by antidiagonals: A(n,k) = ∑_{d∣n, d==1 (mod 4)} d^k - ∑_{d∣n, d==3 (mod 4)} d^k. A322143

a(n) = 1 - n⁶. A24004

Expansion of 1 / ∑_n=-oo..oo x^n². A4402

Expansion of (1-4·x)^13/2. A20925

Expansion of ∏_m>=1 (1+q^m)^-6. A22601

Expansion of (∏_j>=1 (1-(-x)^j) - 1)⁸ in powers of x. A1486

a(n) = 1 - n³. A24001

McKay-Thompson series of class 8c for the Monster group. A112145

Expansion of (φ(x) * ψ(-x))⁴ in powers of·where φ(), ψ() are Ramanujan θ functions. A134461

McKay-Thompson series of class 12E for the Monster group with a(0) = -2. A187196