218490716 has 12 divisors (see below), whose sum is σ = 383711832. Its totient is φ = 108858768.

The previous prime is 218490653. The next prime is 218490721. The reversal of 218490716 is 617094812.

It is a self number, because there is not a number n which added to its sum of digits gives 218490716.

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, 95375 + ... + 97638.

It is an arithmetic number, because the mean of its divisors is an integer number (31975986).

Almost surely, 2^218490716 is an apocalyptic number.

It is an amenable number.

218490716 is a deficient number, since it is larger than the sum of its proper divisors (165221116).

218490716 is a wasteful number, since it uses less digits than its factorization.

218490716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193300 (or 193298 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 218490716 is about 14781.4314597741. The cubic root of 218490716 is about 602.2974104660.

The spelling of 218490716 in words is "two hundred eighteen million, four hundred ninety thousand, seven hundred sixteen".