304431220 has 48 divisors (see below), whose sum is σ = 681343488. Its totient is φ = 113991680.

The previous prime is 304431217. The next prime is 304431221. The reversal of 304431220 is 22134403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304431221) 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, 14580 + ... + 28660.

It is an arithmetic number, because the mean of its divisors is an integer number (14194656).

Almost surely, 2^304431220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 304431220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (340671744).

304431220 is an abundant number, since it is smaller than the sum of its proper divisors (376912268).

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

304431220 is a wasteful number, since it uses less digits than its factorization.

304431220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14160 (or 14158 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 304431220 is about 17447.9574735841. The cubic root of 304431220 is about 672.7128590112.

Adding to 304431220 its reverse (22134403), we get a palindrome (326565623).

The spelling of 304431220 in words is "three hundred four million, four hundred thirty-one thousand, two hundred twenty".