304312220 has 24 divisors (see below), whose sum is σ = 651115584. Its totient is φ = 119427776.

The previous prime is 304312219. The next prime is 304312231. The reversal of 304312220 is 22213403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142484 + ... + 144603.

It is an arithmetic number, because the mean of its divisors is an integer number (27129816).

Almost surely, 2^304312220 is an apocalyptic number.

It is an amenable number.

304312220 is an abundant number, since it is smaller than the sum of its proper divisors (346803364).

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

304312220 is a wasteful number, since it uses less digits than its factorization.

304312220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287149 (or 287147 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 304312220 is about 17444.5469989908. The cubic root of 304312220 is about 672.6251946961.

Adding to 304312220 its reverse (22213403), we get a palindrome (326525623).

The spelling of 304312220 in words is "three hundred four million, three hundred twelve thousand, two hundred twenty".