128388338 has 16 divisors (see below), whose sum is σ = 208146456. Its totient is φ = 59041920.

The previous prime is 128388331. The next prime is 128388353. The reversal of 128388338 is 833883821.

It can be written as a sum of positive squares in 4 ways, for example, as 109265209 + 19123129 = 10453^2 + 4373^2 .

It is not an unprimeable number, because it can be changed into a prime (128388331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1481 + ... + 16092.

Almost surely, 2^128388338 is an apocalyptic number.

128388338 is a deficient number, since it is larger than the sum of its proper divisors (79758118).

128388338 is a wasteful number, since it uses less digits than its factorization.

128388338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17869.

The product of its digits is 221184, while the sum is 44.

The square root of 128388338 is about 11330.8577786503. The cubic root of 128388338 is about 504.4775670939.

The spelling of 128388338 in words is "one hundred twenty-eight million, three hundred eighty-eight thousand, three hundred thirty-eight".