216378304 has 28 divisors (see below), whose sum is σ = 430453800. Its totient is φ = 107917568.

The previous prime is 216378293. The next prime is 216378317. The reversal of 216378304 is 403873612.

It is a happy number.

216378304 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 216378304.

It is a congruent number.

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, 22782 + ... + 30850.

It is an arithmetic number, because the mean of its divisors is an integer number (15373350).

Almost surely, 2^216378304 is an apocalyptic number.

It is an amenable number.

216378304 is a deficient number, since it is larger than the sum of its proper divisors (214075496).

216378304 is an equidigital number, since it uses as much as digits as its factorization.

216378304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8500 (or 8490 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 216378304 is about 14709.8029898432. The cubic root of 216378304 is about 600.3500771850.

The spelling of 216378304 in words is "two hundred sixteen million, three hundred seventy-eight thousand, three hundred four".