216728308 has 24 divisors (see below), whose sum is σ = 402300864. Its totient is φ = 101808000.

The previous prime is 216728279. The next prime is 216728321. The reversal of 216728308 is 803827612.

216728308 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 7 ways as a sum of consecutive naturals, for example, 40383 + ... + 45433.

It is an arithmetic number, because the mean of its divisors is an integer number (16762536).

Almost surely, 2^216728308 is an apocalyptic number.

It is an amenable number.

216728308 is a deficient number, since it is larger than the sum of its proper divisors (185572556).

216728308 is a wasteful number, since it uses less digits than its factorization.

216728308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5703 (or 5701 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 216728308 is about 14721.6951469591. The cubic root of 216728308 is about 600.6736027418.

The spelling of 216728308 in words is "two hundred sixteen million, seven hundred twenty-eight thousand, three hundred eight".