128388 has 24 divisors (see below), whose sum is σ = 323008. Its totient is φ = 39456.

The previous prime is 128377. The next prime is 128389. The reversal of 128388 is 883821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128389) by changing a digit.

128388 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256 + ... + 567.

2¹²⁸³⁸⁸ is an apocalyptic number.

It is an amenable number.

128388 is an abundant number, since it is smaller than the sum of its proper divisors (194620).

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

128388 is a wasteful number, since it uses less digits than its factorization.

128388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843 (or 841 counting only the distinct ones).

The product of its digits is 3072, while the sum is 30.

The square root of 128388 is about 358.3127125850. The cubic root of 128388 is about 50.4477124391.

Subtracting from 128388 its product of digits (3072), we obtain a square (125316 = 354²).

The spelling of 128388 in words is "one hundred twenty-eight thousand, three hundred eighty-eight".