320128684 has 12 divisors (see below), whose sum is σ = 560883400. Its totient is φ = 159876288.

The previous prime is 320128681. The next prime is 320128687. The reversal of 320128684 is 486821023.

It is an interprime number because it is at equal distance from previous prime (320128681) and next prime (320128687).

It is not an unprimeable number, because it can be changed into a prime (320128681) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 43149 + ... + 50020.

Almost surely, 2^320128684 is an apocalyptic number.

It is an amenable number.

320128684 is a deficient number, since it is larger than the sum of its proper divisors (240754716).

320128684 is a wasteful number, since it uses less digits than its factorization.

320128684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94032 (or 94030 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 320128684 is about 17892.1402856114. The cubic root of 320128684 is about 684.0820524436.

The spelling of 320128684 in words is "three hundred twenty million, one hundred twenty-eight thousand, six hundred eighty-four".