328611985 has 32 divisors (see below), whose sum is σ = 439729920. Its totient is φ = 234171648.

The previous prime is 328611953. The next prime is 328611991. The reversal of 328611985 is 589116823.

It is a cyclic number.

It is not a de Polignac number, because 328611985 - 2⁵ = 328611953 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 333804 + ... + 334786.

It is an arithmetic number, because the mean of its divisors is an integer number (13741560).

Almost surely, 2^328611985 is an apocalyptic number.

It is an amenable number.

328611985 is a deficient number, since it is larger than the sum of its proper divisors (111117935).

328611985 is a wasteful number, since it uses less digits than its factorization.

328611985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177.

The product of its digits is 103680, while the sum is 43.

The square root of 328611985 is about 18127.6580119992. The cubic root of 328611985 is about 690.0720956663.

The spelling of 328611985 in words is "three hundred twenty-eight million, six hundred eleven thousand, nine hundred eighty-five".