390635394 has 16 divisors (see below), whose sum is σ = 808211520. Its totient is φ = 125721680.

The previous prime is 390635369. The next prime is 390635407. The reversal of 390635394 is 493536093.

It is a super-2 number, since 2×390635394² = 305192022091070472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1122342 + ... + 1122689.

It is an arithmetic number, because the mean of its divisors is an integer number (50513220).

Almost surely, 2^390635394 is an apocalyptic number.

390635394 is an abundant number, since it is smaller than the sum of its proper divisors (417576126).

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

390635394 is a wasteful number, since it uses less digits than its factorization.

390635394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2245065.

The product of its (nonzero) digits is 262440, while the sum is 42.

The square root of 390635394 is about 19764.4983240152. The cubic root of 390635394 is about 731.0109181737.

The spelling of 390635394 in words is "three hundred ninety million, six hundred thirty-five thousand, three hundred ninety-four".