328646686 has 32 divisors (see below), whose sum is σ = 567198720. Its totient is φ = 141782400.

The previous prime is 328646671. The next prime is 328646699. The reversal of 328646686 is 686646823.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11821 + ... + 28231.

It is an arithmetic number, because the mean of its divisors is an integer number (17724960).

Almost surely, 2^328646686 is an apocalyptic number.

328646686 is a deficient number, since it is larger than the sum of its proper divisors (238552034).

328646686 is a wasteful number, since it uses less digits than its factorization.

328646686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16480.

The product of its digits is 1990656, while the sum is 49.

The square root of 328646686 is about 18128.6151153363. The cubic root of 328646686 is about 690.0963850512.

The spelling of 328646686 in words is "three hundred twenty-eight million, six hundred forty-six thousand, six hundred eighty-six".