304388140 has 48 divisors (see below), whose sum is σ = 732985344. Its totient is φ = 104011200.

The previous prime is 304388131. The next prime is 304388167. The reversal of 304388140 is 41883403.

304388140 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40045 + ... + 47035.

It is an arithmetic number, because the mean of its divisors is an integer number (15270528).

Almost surely, 2^304388140 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 304388140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366492672).

304388140 is an abundant number, since it is smaller than the sum of its proper divisors (428597204).

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

304388140 is a wasteful number, since it uses less digits than its factorization.

304388140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7318 (or 7316 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 304388140 is about 17446.7229014506. The cubic root of 304388140 is about 672.6811256943.

The spelling of 304388140 in words is "three hundred four million, three hundred eighty-eight thousand, one hundred forty".