328718638 has 4 divisors (see below), whose sum is σ = 493077960. Its totient is φ = 164359318.

The previous prime is 328718627. The next prime is 328718641. The reversal of 328718638 is 836817823.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82179658 + ... + 82179661.

It is an arithmetic number, because the mean of its divisors is an integer number (123269490).

Almost surely, 2^328718638 is an apocalyptic number.

328718638 is a deficient number, since it is larger than the sum of its proper divisors (164359322).

328718638 is a wasteful number, since it uses less digits than its factorization.

328718638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164359321.

The product of its digits is 387072, while the sum is 46.

The square root of 328718638 is about 18130.5994936737. The cubic root of 328718638 is about 690.1467432768.

The spelling of 328718638 in words is "three hundred twenty-eight million, seven hundred eighteen thousand, six hundred thirty-eight".