390128 has 20 divisors (see below), whose sum is σ = 777480. Its totient is φ = 189504.

The previous prime is 390119. The next prime is 390151. The reversal of 390128 is 821093.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263 + ... + 921.

It is an arithmetic number, because the mean of its divisors is an integer number (38874).

2³⁹⁰¹²⁸ is an apocalyptic number.

It is an amenable number.

390128 is a deficient number, since it is larger than the sum of its proper divisors (387352).

390128 is a wasteful number, since it uses less digits than its factorization.

390128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704 (or 698 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 390128 is about 624.6022734509. The cubic root of 390128 is about 73.0694279123.

The spelling of 390128 in words is "three hundred ninety thousand, one hundred twenty-eight".