328728866 has 16 divisors (see below), whose sum is σ = 498139200. Its totient is φ = 162690480.

The previous prime is 328728863. The next prime is 328728923. The reversal of 328728866 is 668827823.

328728866 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (328728863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90905 + ... + 94451.

It is an arithmetic number, because the mean of its divisors is an integer number (31133700).

Almost surely, 2^328728866 is an apocalyptic number.

328728866 is a deficient number, since it is larger than the sum of its proper divisors (169410334).

328728866 is a wasteful number, since it uses less digits than its factorization.

328728866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4009.

The product of its digits is 1548288, while the sum is 50.

The square root of 328728866 is about 18130.8815560634. The cubic root of 328728866 is about 690.1539011183.

The spelling of 328728866 in words is "three hundred twenty-eight million, seven hundred twenty-eight thousand, eight hundred sixty-six".