128339328 has 128 divisors (see below), whose sum is σ = 375621120. Its totient is φ = 38578176.

The previous prime is 128339311. The next prime is 128339359. The reversal of 128339328 is 823933821.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×128339328² = 32941966222983168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234351 + ... + 234897.

It is an arithmetic number, because the mean of its divisors is an integer number (2934540).

Almost surely, 2^128339328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128339328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187810560).

128339328 is an abundant number, since it is smaller than the sum of its proper divisors (247281792).

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

128339328 is a wasteful number, since it uses less digits than its factorization.

128339328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624 (or 612 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

The square root of 128339328 is about 11328.6948939408. The cubic root of 128339328 is about 504.4133670981.

The spelling of 128339328 in words is "one hundred twenty-eight million, three hundred thirty-nine thousand, three hundred twenty-eight".