128438579328 has 32 divisors (see below), whose sum is σ = 341164977360. Its totient is φ = 42812859648.

The previous prime is 128438579323. The next prime is 128438579393. The reversal of 128438579328 is 823975834821.

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

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (128438579323) 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, 167237350 + ... + 167238117.

Almost surely, 2^128438579328 is an apocalyptic number.

It is an amenable number.

128438579328 is an abundant number, since it is smaller than the sum of its proper divisors (212726398032).

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

128438579328 is an equidigital number, since it uses as much as digits as its factorization.

128438579328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334475484 (or 334475472 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 60.

The spelling of 128438579328 in words is "one hundred twenty-eight billion, four hundred thirty-eight million, five hundred seventy-nine thousand, three hundred twenty-eight".