Properties of the Number -128800

One Hundred Twenty-Eight Thousand Eight Hundred

Basics

Value: -128801 → -128800 → -128799

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ⁵ × 5 ² × 7 × 23

Divisors: 1, 2, 4, 5, 7, 8, 10, 14, 16, 20

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11111011100100000

Octal: -373440

Duodecimal: -62654

Hexadecimal: -1f720

Square: 16589440000

Square Root: 358.8871688985272

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 (1-x)^-1/(1-x²+x³). A77883

Dying rabbits: a(n) = a(n-1) + a(n-2) - a(n-4). A23434

Expansion of g.f. x/((1-x)*(1-3·x+2·x²-x³)). A137229

Partial sums of A007587. A51799

Number of compositions of n into parts 2 and 3 with at least one 2 and one 3. A245332

The number of partitions of [n] with exactly 2 blocks without peaks. A289692

Partial sums of A012814. A176476

a(1) = greatest k such that H(k) - H(8) < H(8) - H(4); a(2) = greatest k such that H(k) - H(a(1)) < H(a(1)) - H(8), and for n > 2, a(n) = greatest k such that H(k) - H(a(n-1)) > H(a(n-1)) - H(a(n-2)), where H = harmonic number. A227804

Pisot sequences E(6,8), P(6,8). A20716

a(n) = A000931(n+4) - A010060(n). A140514