128012928 has 32 divisors (see below), whose sum is σ = 340035360. Its totient is φ = 42670848.

The previous prime is 128012909. The next prime is 128012957. The reversal of 128012928 is 829210821.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166300 + ... + 167067.

It is an arithmetic number, because the mean of its divisors is an integer number (10626105).

Almost surely, 2^128012928 is an apocalyptic number.

It is an amenable number.

128012928 is an abundant number, since it is smaller than the sum of its proper divisors (212022432).

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

128012928 is an equidigital number, since it uses as much as digits as its factorization.

128012928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333384 (or 333372 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 128012928 is about 11314.2798268383. The cubic root of 128012928 is about 503.9853863236.

The spelling of 128012928 in words is "one hundred twenty-eight million, twelve thousand, nine hundred twenty-eight".