390647966 has 16 divisors (see below), whose sum is σ = 601174224. Its totient is φ = 190321344.

The previous prime is 390647953. The next prime is 390647993. The reversal of 390647966 is 669746093.

It is a congruent number.

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, 4001 + ... + 28236.

It is an arithmetic number, because the mean of its divisors is an integer number (37573389).

Almost surely, 2^390647966 is an apocalyptic number.

390647966 is a deficient number, since it is larger than the sum of its proper divisors (210526258).

390647966 is a wasteful number, since it uses less digits than its factorization.

390647966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32395.

The product of its (nonzero) digits is 1469664, while the sum is 50.

The square root of 390647966 is about 19764.8163664629. The cubic root of 390647966 is about 731.0187602440.

The spelling of 390647966 in words is "three hundred ninety million, six hundred forty-seven thousand, nine hundred sixty-six".