128388339 has 12 divisors (see below), whose sum is σ = 195210600. Its totient is φ = 81087264.

The previous prime is 128388331. The next prime is 128388353. The reversal of 128388339 is 933883821.

It is not a de Polignac number, because 128388339 - 2³ = 128388331 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 128388294 and 128388303.

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 11 ways as a sum of consecutive naturals, for example, 375234 + ... + 375575.

It is an arithmetic number, because the mean of its divisors is an integer number (16267550).

Almost surely, 2^128388339 is an apocalyptic number.

128388339 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

128388339 is a deficient number, since it is larger than the sum of its proper divisors (66822261).

128388339 is a wasteful number, since it uses less digits than its factorization.

128388339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750834 (or 750831 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 128388339 is about 11330.8578227776. The cubic root of 128388339 is about 504.4775684036.

The spelling of 128388339 in words is "one hundred twenty-eight million, three hundred eighty-eight thousand, three hundred thirty-nine".