216885928 has 16 divisors (see below), whose sum is σ = 464755680. Its totient is φ = 92951088.

The previous prime is 216885917. The next prime is 216885943. The reversal of 216885928 is 829588612.

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, 1936426 + ... + 1936537.

It is an arithmetic number, because the mean of its divisors is an integer number (29047230).

Almost surely, 2^216885928 is an apocalyptic number.

216885928 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

216885928 is an abundant number, since it is smaller than the sum of its proper divisors (247869752).

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

216885928 is a wasteful number, since it uses less digits than its factorization.

216885928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3872976 (or 3872972 counting only the distinct ones).

The product of its digits is 552960, while the sum is 49.

The square root of 216885928 is about 14727.0474977166. The cubic root of 216885928 is about 600.8191847553.

The spelling of 216885928 in words is "two hundred sixteen million, eight hundred eighty-five thousand, nine hundred twenty-eight".