328521644 has 12 divisors (see below), whose sum is σ = 627177768. Its totient is φ = 149328000.

The previous prime is 328521619. The next prime is 328521653. The reversal of 328521644 is 446125823.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3733157 + ... + 3733244.

It is an arithmetic number, because the mean of its divisors is an integer number (52264814).

Almost surely, 2^328521644 is an apocalyptic number.

It is an amenable number.

328521644 is a deficient number, since it is larger than the sum of its proper divisors (298656124).

328521644 is a wasteful number, since it uses less digits than its factorization.

328521644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7466416 (or 7466414 counting only the distinct ones).

The product of its digits is 46080, while the sum is 35.

The square root of 328521644 is about 18125.1660406188. The cubic root of 328521644 is about 690.0088523684.

The spelling of 328521644 in words is "three hundred twenty-eight million, five hundred twenty-one thousand, six hundred forty-four".