Properties of the Number -128000

One Hundred Twenty-Eight Thousand

Basics

Value: -128001 → -128000 → -127999

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 2 ¹⁰ × 5 ³

Divisors: 1, 2, 4, 5, 8, 10, 16, 20, 25, 32

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8109 Try Today's Challenge

Representations

Binary: -11111010000000000

Octal: -372000

Duodecimal: -620A8

Hexadecimal: -1f400

Square: 16384000000

Square Root: 357.77087639996637

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: Yes

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

Triangle read by rows: coefficients T(n,k) of a binomial decomposition of 1 as ∑_k=0..n T(n,k)*binomial(n,k). A244118

a(n) is the maximal number of a's that can be produced in a blank document with n "keystrokes". A193286

a(n) = 2·n³. A33431

a(n) = ∏_i=0..7 floor((n+i)/8). A9694

Number of divisors of 240ⁿ. A103532

Numbers of form 4ⁱ*5^j, with i, j >= 0. A25617

Coefficient of qⁿ in (1-q)⁵/(1-5q); dimensions of the enveloping algebra of the derived free Lie algebra on 5 letters. A118266

Number of permutations p of (1,2,3,...,n) such that k+p(k) is a Fibonacci number for 1 <= k <= n. A97082

Numbers with 44 divisors. A175751

Triangle read by rows: D*(n,m) is the number of direct-sum decompositions of a finite vector space of dimension n with m blocks over GF(2) with a block containing any given nonzero vector. A270882