128832320 has 28 divisors (see below), whose sum is σ = 306782724. Its totient is φ = 51532800.

The previous prime is 128832299. The next prime is 128832323. The reversal of 128832320 is 23238821.

It can be written as a sum of positive squares in 2 ways, for example, as 82156096 + 46676224 = 9064^2 + 6832^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128832323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200981 + ... + 201620.

Almost surely, 2^128832320 is an apocalyptic number.

128832320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128832320 is an abundant number, since it is smaller than the sum of its proper divisors (177950404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128832320 is an equidigital number, since it uses as much as digits as its factorization.

128832320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402618 (or 402608 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 128832320 is about 11350.4325908751. The cubic root of 128832320 is about 505.0584123525.

The spelling of 128832320 in words is "one hundred twenty-eight million, eight hundred thirty-two thousand, three hundred twenty".