328172221828 has 24 divisors (see below), whose sum is σ = 632593241280. Its totient is φ = 147720945120.

The previous prime is 328172221777. The next prime is 328172221843. The reversal of 328172221828 is 828122271823.

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 in 7 ways as a sum of consecutive naturals, for example, 36201583 + ... + 36210646.

It is an arithmetic number, because the mean of its divisors is an integer number (26358051720).

Almost surely, 2^328172221828 is an apocalyptic number.

It is an amenable number.

328172221828 is a deficient number, since it is larger than the sum of its proper divisors (304421019452).

328172221828 is a wasteful number, since it uses less digits than its factorization.

328172221828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72412347 (or 72412345 counting only the distinct ones).

The product of its digits is 344064, while the sum is 46.

The spelling of 328172221828 in words is "three hundred twenty-eight billion, one hundred seventy-two million, two hundred twenty-one thousand, eight hundred twenty-eight".