218793916 has 12 divisors (see below), whose sum is σ = 417697560. Its totient is φ = 99451760.

The previous prime is 218793901. The next prime is 218793929. The reversal of 218793916 is 619397812.

It is a happy number.

218793916 is digitally balanced in base 2 and base 3, because in such bases 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 3 ways as a sum of consecutive naturals, for example, 2486251 + ... + 2486338.

It is an arithmetic number, because the mean of its divisors is an integer number (34808130).

Almost surely, 2^218793916 is an apocalyptic number.

It is an amenable number.

218793916 is a deficient number, since it is larger than the sum of its proper divisors (198903644).

218793916 is a wasteful number, since it uses less digits than its factorization.

218793916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4972604 (or 4972602 counting only the distinct ones).

The product of its digits is 163296, while the sum is 46.

The square root of 218793916 is about 14791.6840150133. The cubic root of 218793916 is about 602.5758847964.

The spelling of 218793916 in words is "two hundred eighteen million, seven hundred ninety-three thousand, nine hundred sixteen".