216086988 has 48 divisors (see below), whose sum is σ = 560516096. Its totient is φ = 64342080.

The previous prime is 216086977. The next prime is 216087013. The reversal of 216086988 is 889680612.

216086988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17506 + ... + 27177.

Almost surely, 2^216086988 is an apocalyptic number.

It is an amenable number.

216086988 is an abundant number, since it is smaller than the sum of its proper divisors (344429108).

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

216086988 is a wasteful number, since it uses less digits than its factorization.

216086988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44734 (or 44732 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 48.

The square root of 216086988 is about 14699.8975506634. The cubic root of 216086988 is about 600.0805336345.

The spelling of 216086988 in words is "two hundred sixteen million, eighty-six thousand, nine hundred eighty-eight".