216939288 has 32 divisors (see below), whose sum is σ = 557008560. Its totient is φ = 70358400.

The previous prime is 216939277. The next prime is 216939301. The reversal of 216939288 is 882939612.

216939288 is digitally balanced in base 3, 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, 121263 + ... + 123038.

Almost surely, 2^216939288 is an apocalyptic number.

It is an amenable number.

216939288 is an abundant number, since it is smaller than the sum of its proper divisors (340069272).

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

216939288 is a wasteful number, since it uses less digits than its factorization.

216939288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244347 (or 244343 counting only the distinct ones).

The product of its digits is 373248, while the sum is 48.

The square root of 216939288 is about 14728.8590189464. The cubic root of 216939288 is about 600.8684534855.

The spelling of 216939288 in words is "two hundred sixteen million, nine hundred thirty-nine thousand, two hundred eighty-eight".