328728818 has 16 divisors (see below), whose sum is σ = 538202880. Its totient is φ = 149343600.

The previous prime is 328728809. The next prime is 328728821. The reversal of 328728818 is 818827823.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68543 + ... + 73181.

It is an arithmetic number, because the mean of its divisors is an integer number (33637680).

Almost surely, 2^328728818 is an apocalyptic number.

328728818 is a deficient number, since it is larger than the sum of its proper divisors (209474062).

328728818 is a wasteful number, since it uses less digits than its factorization.

328728818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7873.

The product of its digits is 344064, while the sum is 47.

The square root of 328728818 is about 18130.8802323550. The cubic root of 328728818 is about 690.1538675269.

The spelling of 328728818 in words is "three hundred twenty-eight million, seven hundred twenty-eight thousand, eight hundred eighteen".