Properties of the Number -8128

One Hundred Twenty-Eight

Basics

Value: -8129 → -8128 → -8127

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ⁶ × 127

Divisors: 1, 2, 4, 8, 16, 32, 64, 127, 254, 508

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: Yes

Heptagonal: No

Tetrahedral: No

Today's Target

7925 Try Today's Challenge

Representations

Binary: -1111111000000

Octal: -17700

Duodecimal: -4854

Hexadecimal: -1fc0

Square: 66064384

Square Root: 90.15542135667715

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

G.f.: q * ∏_m>=1 (1-q^m)⁸*(1-q^2m)⁸. A2288

Antidiagonal-sums of the array A377033(n,k) = n-th term of the k-th differences of the composite numbers (A002808). A377034

Table of the numerators of the fractions of Bernoulli twin numbers and their higher-order differences, read by antidiagonals. A168516

Expansion of q^-3 * (η(q) * η(q⁸))⁸ in powers of q. A34433

Array read by antidiagonals: numerators of the core of the classical Bernoulli numbers. A240581

First term of n-th difference sequence of (round(k·sqrt(3))), k >= 0. A325841

First term of n-th difference sequence of (round(k·sqrt(5))), k >= 0. A325842

Matrix inverse of triangle A296548, read by rows. A373396

Perfect numbers k: k is equal to the sum of the proper divisors of k. A396

Multiply-perfect numbers: n divides σ(n). A7691