390425638 has 16 divisors (see below), whose sum is σ = 634510800. Its totient is φ = 179456256.

The previous prime is 390425573. The next prime is 390425639. The reversal of 390425638 is 836524093.

It is a self number, because there is not a number n which added to its sum of digits gives 390425638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390425639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132063 + ... + 134986.

It is an arithmetic number, because the mean of its divisors is an integer number (39656925).

Almost surely, 2^390425638 is an apocalyptic number.

390425638 is a deficient number, since it is larger than the sum of its proper divisors (244085162).

390425638 is a wasteful number, since it uses less digits than its factorization.

390425638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267111.

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 390425638 is about 19759.1912283879. The cubic root of 390425638 is about 730.8800532789.

The spelling of 390425638 in words is "three hundred ninety million, four hundred twenty-five thousand, six hundred thirty-eight".