388428 has 12 divisors (see below), whose sum is σ = 906360. Its totient is φ = 129472.

The previous prime is 388403. The next prime is 388459. The reversal of 388428 is 824883.

388428 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×388428² = 301752622368, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16173 + ... + 16196.

It is an arithmetic number, because the mean of its divisors is an integer number (75530).

2³⁸⁸⁴²⁸ is an apocalyptic number.

It is an amenable number.

388428 is an abundant number, since it is smaller than the sum of its proper divisors (517932).

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

388428 is a wasteful number, since it uses less digits than its factorization.

388428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32376 (or 32374 counting only the distinct ones).

The product of its digits is 12288, while the sum is 33.

The square root of 388428 is about 623.2399216995. The cubic root of 388428 is about 72.9631389558.

The spelling of 388428 in words is "three hundred eighty-eight thousand, four hundred twenty-eight".