304021218 has 16 divisors (see below), whose sum is σ = 618348960. Its totient is φ = 99622656.

The previous prime is 304021213. The next prime is 304021271. The reversal of 304021218 is 812120403.

It is a junction number, because it is equal to n+sod(n) for n = 304021194 and 304021203.

It is not an unprimeable number, because it can be changed into a prime (304021213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429055 + ... + 429762.

It is an arithmetic number, because the mean of its divisors is an integer number (38646810).

Almost surely, 2^304021218 is an apocalyptic number.

304021218 is an abundant number, since it is smaller than the sum of its proper divisors (314327742).

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

304021218 is a wasteful number, since it uses less digits than its factorization.

304021218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858881.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 304021218 is about 17436.2042314261. The cubic root of 304021218 is about 672.4107245034.

The spelling of 304021218 in words is "three hundred four million, twenty-one thousand, two hundred eighteen".