390686168 has 16 divisors (see below), whose sum is σ = 734506080. Its totient is φ = 194817888.

The previous prime is 390686167. The next prime is 390686203. The reversal of 390686168 is 861686093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390686167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62480 + ... + 68447.

It is an arithmetic number, because the mean of its divisors is an integer number (45906630).

Almost surely, 2^390686168 is an apocalyptic number.

It is an amenable number.

390686168 is a deficient number, since it is larger than the sum of its proper divisors (343819912).

390686168 is a wasteful number, since it uses less digits than its factorization.

390686168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131306 (or 131302 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 390686168 is about 19765.7827570779. The cubic root of 390686168 is about 731.0425885761.

The spelling of 390686168 in words is "three hundred ninety million, six hundred eighty-six thousand, one hundred sixty-eight".