216777328 has 20 divisors (see below), whose sum is σ = 427126680. Its totient is φ = 106551104.

The previous prime is 216777317. The next prime is 216777371. The reversal of 216777328 is 823777612.

216777328 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 113875 + ... + 115762.

It is an arithmetic number, because the mean of its divisors is an integer number (21356334).

Almost surely, 2^216777328 is an apocalyptic number.

It is an amenable number.

216777328 is a deficient number, since it is larger than the sum of its proper divisors (210349352).

216777328 is a wasteful number, since it uses less digits than its factorization.

216777328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229704 (or 229698 counting only the distinct ones).

The product of its digits is 197568, while the sum is 43.

The square root of 216777328 is about 14723.3599426218. The cubic root of 216777328 is about 600.7188864745.

The spelling of 216777328 in words is "two hundred sixteen million, seven hundred seventy-seven thousand, three hundred twenty-eight".