349663218 has 16 divisors (see below), whose sum is σ = 709764960. Its totient is φ = 114814656.

The previous prime is 349663201. The next prime is 349663247. The reversal of 349663218 is 812366943.

It is a self number, because there is not a number n which added to its sum of digits gives 349663218.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 434503 + ... + 435306.

It is an arithmetic number, because the mean of its divisors is an integer number (44360310).

Almost surely, 2^349663218 is an apocalyptic number.

349663218 is an abundant number, since it is smaller than the sum of its proper divisors (360101742).

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

349663218 is a wasteful number, since it uses less digits than its factorization.

349663218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869881.

The product of its digits is 186624, while the sum is 42.

The square root of 349663218 is about 18699.2838900317. The cubic root of 349663218 is about 704.5037622517.

The spelling of 349663218 in words is "three hundred forty-nine million, six hundred sixty-three thousand, two hundred eighteen".