216823888 has 40 divisors (see below), whose sum is σ = 435159648. Its totient is φ = 104587392.

The previous prime is 216823853. The next prime is 216823891. The reversal of 216823888 is 888328612.

It is a happy number.

216823888 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55206 + ... + 59002.

Almost surely, 2^216823888 is an apocalyptic number.

It is an amenable number.

216823888 is an abundant number, since it is smaller than the sum of its proper divisors (218335760).

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

216823888 is a wasteful number, since it uses less digits than its factorization.

216823888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3931 (or 3925 counting only the distinct ones).

The product of its digits is 294912, while the sum is 46.

The square root of 216823888 is about 14724.9410185576. The cubic root of 216823888 is about 600.7618913856.

The spelling of 216823888 in words is "two hundred sixteen million, eight hundred twenty-three thousand, eight hundred eighty-eight".