128169328 has 40 divisors (see below), whose sum is σ = 293597280. Its totient is φ = 53034240.

The previous prime is 128169311. The next prime is 128169359. The reversal of 128169328 is 823961821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16483 + ... + 22978.

It is an arithmetic number, because the mean of its divisors is an integer number (7339932).

Almost surely, 2^128169328 is an apocalyptic number.

It is an amenable number.

128169328 is an abundant number, since it is smaller than the sum of its proper divisors (165427952).

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

128169328 is a wasteful number, since it uses less digits than its factorization.

128169328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39505 (or 39499 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The square root of 128169328 is about 11321.1893368144. The cubic root of 128169328 is about 504.1905511107.

The spelling of 128169328 in words is "one hundred twenty-eight million, one hundred sixty-nine thousand, three hundred twenty-eight".