304040220 has 96 divisors (see below), whose sum is σ = 969131520. Its totient is φ = 70498560.

The previous prime is 304040167. The next prime is 304040251. The reversal of 304040220 is 22040403.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 304040220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5166 + ... + 25194.

It is an arithmetic number, because the mean of its divisors is an integer number (10095120).

Almost surely, 2^304040220 is an apocalyptic number.

304040220 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 304040220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (484565760).

304040220 is an abundant number, since it is smaller than the sum of its proper divisors (665091300).

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

304040220 is a wasteful number, since it uses less digits than its factorization.

304040220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20075 (or 20073 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 304040220 is about 17436.7491236182. The cubic root of 304040220 is about 672.4247332651.

Adding to 304040220 its reverse (22040403), we get a palindrome (326080623).

The spelling of 304040220 in words is "three hundred four million, forty thousand, two hundred twenty".