390857930 has 16 divisors (see below), whose sum is σ = 740573280. Its totient is φ = 148114512.

The previous prime is 390857903. The next prime is 390857947. The reversal of 390857930 is 39758093.

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, 1028384 + ... + 1028763.

It is an arithmetic number, because the mean of its divisors is an integer number (46285830).

Almost surely, 2^390857930 is an apocalyptic number.

390857930 is a deficient number, since it is larger than the sum of its proper divisors (349715350).

390857930 is a wasteful number, since it uses less digits than its factorization.

390857930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2057173.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 390857930 is about 19770.1272125396. The cubic root of 390857930 is about 731.1497051918.

The spelling of 390857930 in words is "three hundred ninety million, eight hundred fifty-seven thousand, nine hundred thirty".