390953690 has 64 divisors (see below), whose sum is σ = 763395840. Its totient is φ = 143700480.

The previous prime is 390953687. The next prime is 390953713. The reversal of 390953690 is 96359093.

It is a super-2 number, since 2×390953690² = 305689575449232200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 984572 + ... + 984968.

It is an arithmetic number, because the mean of its divisors is an integer number (11928060).

Almost surely, 2^390953690 is an apocalyptic number.

390953690 is a deficient number, since it is larger than the sum of its proper divisors (372442150).

390953690 is a wasteful number, since it uses less digits than its factorization.

390953690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567.

The product of its (nonzero) digits is 196830, while the sum is 44.

The square root of 390953690 is about 19772.5488999269. The cubic root of 390953690 is about 731.2094107551.

The spelling of 390953690 in words is "three hundred ninety million, nine hundred fifty-three thousand, six hundred ninety".