Properties of the Number -128768

One Hundred Twenty-Eight Thousand Seven Hundred Sixty-Eight

Basics

Value: -128769 → -128768 → -128767

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 2 ⁸ × 503

Divisors: 1, 2, 4, 8, 16, 32, 64, 128, 256, 503

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11111011100000000

Octal: -373400

Duodecimal: -62628

Hexadecimal: -1f700

Square: 16581197824

Square Root: 358.84258387209286

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

Numbers k whose abundance is 8: σ(k) - 2·k = 8. A88833

Numbers k such that σ(k) == 8 (mod k). A45770

Abundant numbers n for which the abundance d = σ(n) - 2·n is a proper divisor, that is, 0 < d < n and d | n. A181595

Abundant numbers n such that n/(σ(n)-2n) is an integer. A153501

Numbers m divisible by 8 and with abundance σ(m)-2·m = 8. A181598

Numbers k such that σ(k) == 0 (mod k+4). A274553

Near-perfect numbers (A181595) of the form 2^t-1*(2^t-2^k-1), where 2^t-2^k-1 is prime, k>=1, t>k. A181701

Triangle, read by rows, where row n equals the inverse binomial transform of the crystal ball sequence for D_n lattice. A108556

a(n) = 2ⁿ*(2ⁿ⁺¹ - n - 1). A8353

9th column of the array A172119. A172318