64328816 has 20 divisors (see below), whose sum is σ = 131969232. Its totient is φ = 30272256.

The previous prime is 64328791. The next prime is 64328843. The reversal of 64328816 is 61882346.

It is a happy number.

64328816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 64328816.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 117980 + ... + 118523.

Almost surely, 2^64328816 is an apocalyptic number.

It is an amenable number.

64328816 is an abundant number, since it is smaller than the sum of its proper divisors (67640416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64328816 is a wasteful number, since it uses less digits than its factorization.

64328816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236528 (or 236522 counting only the distinct ones).

The product of its digits is 55296, while the sum is 38.

The square root of 64328816 is about 8020.5246711172. The cubic root of 64328816 is about 400.6838634938.

The spelling of 64328816 in words is "sixty-four million, three hundred twenty-eight thousand, eight hundred sixteen".