390016686 has 32 divisors (see below), whose sum is σ = 869391360. Its totient is φ = 115917696.

The previous prime is 390016661. The next prime is 390016699. The reversal of 390016686 is 686610093.

It is a happy number.

It is a super-2 number, since 2×390016686² = 304226030716845192, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98686 + ... + 102561.

It is an arithmetic number, because the mean of its divisors is an integer number (27168480).

Almost surely, 2^390016686 is an apocalyptic number.

390016686 is an abundant number, since it is smaller than the sum of its proper divisors (479374674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

390016686 is a wasteful number, since it uses less digits than its factorization.

390016686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201288.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 390016686 is about 19748.8401178398. The cubic root of 390016686 is about 730.6247769424.

The spelling of 390016686 in words is "three hundred ninety million, sixteen thousand, six hundred eighty-six".