219806868 has 12 divisors (see below), whose sum is σ = 512882720. Its totient is φ = 73268952.

The previous prime is 219806819. The next prime is 219806879. The reversal of 219806868 is 868608912.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

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, 9158608 + ... + 9158631.

Almost surely, 2^219806868 is an apocalyptic number.

It is an amenable number.

219806868 is an abundant number, since it is smaller than the sum of its proper divisors (293075852).

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

219806868 is a wasteful number, since it uses less digits than its factorization.

219806868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18317246 (or 18317244 counting only the distinct ones).

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

The square root of 219806868 is about 14825.8850663291. The cubic root of 219806868 is about 603.5043702451.

The spelling of 219806868 in words is "two hundred nineteen million, eight hundred six thousand, eight hundred sixty-eight".