30303218 has 32 divisors (see below), whose sum is σ = 51397632. Its totient is φ = 13280400.

The previous prime is 30303211. The next prime is 30303239. The reversal of 30303218 is 81230303.

It is a Smith number, since the sum of its digits (20) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 30303218.

It is not an unprimeable number, because it can be changed into a prime (30303211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97283 + ... + 97593.

It is an arithmetic number, because the mean of its divisors is an integer number (1606176).

Almost surely, 2^30303218 is an apocalyptic number.

30303218 is a deficient number, since it is larger than the sum of its proper divisors (21094414).

30303218 is a wasteful number, since it uses less digits than its factorization.

30303218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 30303218 is about 5504.8358740293. The cubic root of 30303218 is about 311.7665975733.

The spelling of 30303218 in words is "thirty million, three hundred three thousand, two hundred eighteen".