390038642 has 32 divisors (see below), whose sum is σ = 686776320. Its totient is φ = 162686160.

The previous prime is 390038639. The next prime is 390038651. The reversal of 390038642 is 246830093.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76043 + ... + 81009.

It is an arithmetic number, because the mean of its divisors is an integer number (21461760).

Almost surely, 2^390038642 is an apocalyptic number.

390038642 is a deficient number, since it is larger than the sum of its proper divisors (296737678).

390038642 is a wasteful number, since it uses less digits than its factorization.

390038642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5126.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 390038642 is about 19749.3959907639. The cubic root of 390038642 is about 730.6384868658.

The spelling of 390038642 in words is "three hundred ninety million, thirty-eight thousand, six hundred forty-two".