304043220 has 120 divisors (see below), whose sum is σ = 1027234824. Its totient is φ = 74836224.

The previous prime is 304043219. The next prime is 304043237. The reversal of 304043220 is 22340403.

It can be written as a sum of positive squares in 4 ways, for example, as 4822416 + 299220804 = 2196^2 + 17298^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 304043193 and 304043202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 13842 + ... + 28278.

Almost surely, 2^304043220 is an apocalyptic number.

304043220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 304043220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (513617412).

304043220 is an abundant number, since it is smaller than the sum of its proper divisors (723191604).

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

304043220 is a wasteful number, since it uses less digits than its factorization.

304043220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14471 (or 14460 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 304043220 is about 17436.8351486157. The cubic root of 304043220 is about 672.4269448887.

Adding to 304043220 its reverse (22340403), we get a palindrome (326383623).

The spelling of 304043220 in words is "three hundred four million, forty-three thousand, two hundred twenty".