304128140 has 24 divisors (see below), whose sum is σ = 640861200. Its totient is φ = 121233728.

The previous prime is 304128137. The next prime is 304128157. The reversal of 304128140 is 41821403.

304128140 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 7 ways as a sum of consecutive naturals, for example, 20090 + ... + 31809.

It is an arithmetic number, because the mean of its divisors is an integer number (26702550).

Almost surely, 2^304128140 is an apocalyptic number.

It is an amenable number.

304128140 is an abundant number, since it is smaller than the sum of its proper divisors (336733060).

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

304128140 is a wasteful number, since it uses less digits than its factorization.

304128140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52201 (or 52199 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 304128140 is about 17439.2700535315. The cubic root of 304128140 is about 672.4895425469.

Adding to 304128140 its reverse (41821403), we get a palindrome (345949543).

The spelling of 304128140 in words is "three hundred four million, one hundred twenty-eight thousand, one hundred forty".