390428925 has 12 divisors (see below), whose sum is σ = 645509280. Its totient is φ = 208228720.

The previous prime is 390428903. The next prime is 390428963. The reversal of 390428925 is 529824093.

It is not a de Polignac number, because 390428925 - 2⁸ = 390428669 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2602785 + ... + 2602934.

It is an arithmetic number, because the mean of its divisors is an integer number (53792440).

Almost surely, 2^390428925 is an apocalyptic number.

It is an amenable number.

390428925 is a deficient number, since it is larger than the sum of its proper divisors (255080355).

390428925 is a wasteful number, since it uses less digits than its factorization.

390428925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5205732 (or 5205727 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 390428925 is about 19759.2744046941. The cubic root of 390428925 is about 730.8821043703.

The spelling of 390428925 in words is "three hundred ninety million, four hundred twenty-eight thousand, nine hundred twenty-five".