218649068 has 12 divisors (see below), whose sum is σ = 417421032. Its totient is φ = 99385920.

The previous prime is 218649049. The next prime is 218649077. The reversal of 218649068 is 860946812.

It is a happy number.

218649068 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 4969297 = 218649068 / (2 + 1 + 8 + 6 + 4 + 9 + 0 + 6 + 8).

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, 2484605 + ... + 2484692.

It is an arithmetic number, because the mean of its divisors is an integer number (34785086).

Almost surely, 2^218649068 is an apocalyptic number.

It is an amenable number.

218649068 is a deficient number, since it is larger than the sum of its proper divisors (198771964).

218649068 is a wasteful number, since it uses less digits than its factorization.

218649068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4969312 (or 4969310 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 218649068 is about 14786.7869396972. The cubic root of 218649068 is about 602.4428811286.

The spelling of 218649068 in words is "two hundred eighteen million, six hundred forty-nine thousand, sixty-eight".