304401220 has 96 divisors (see below), whose sum is σ = 686407680. Its totient is φ = 113218560.

The previous prime is 304401203. The next prime is 304401221. The reversal of 304401220 is 22104403.

It is a junction number, because it is equal to n+sod(n) for n = 304401194 and 304401203.

It is not an unprimeable number, because it can be changed into a prime (304401221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2396797 + ... + 2396923.

It is an arithmetic number, because the mean of its divisors is an integer number (7150080).

Almost surely, 2^304401220 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 304401220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (343203840).

304401220 is an abundant number, since it is smaller than the sum of its proper divisors (382006460).

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

304401220 is a wasteful number, since it uses less digits than its factorization.

304401220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 304401220 is about 17447.0977529215. The cubic root of 304401220 is about 672.6907609176.

Adding to 304401220 its reverse (22104403), we get a palindrome (326505623).

The spelling of 304401220 in words is "three hundred four million, four hundred one thousand, two hundred twenty".