304140040 has 32 divisors (see below), whose sum is σ = 714070080. Its totient is φ = 116366272.

The previous prime is 304140019. The next prime is 304140041. The reversal of 304140040 is 40041403.

It is a junction number, because it is equal to n+sod(n) for n = 304139996 and 304140023.

It is not an unprimeable number, because it can be changed into a prime (304140041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164374 + ... + 166213.

It is an arithmetic number, because the mean of its divisors is an integer number (22314690).

Almost surely, 2^304140040 is an apocalyptic number.

It is an amenable number.

304140040 is an abundant number, since it is smaller than the sum of its proper divisors (409930040).

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

304140040 is a wasteful number, since it uses less digits than its factorization.

304140040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330621 (or 330617 counting only the distinct ones).

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

The square root of 304140040 is about 17439.6112341990. The cubic root of 304140040 is about 672.4983135440.

Adding to 304140040 its reverse (40041403), we get a palindrome (344181443).

The spelling of 304140040 in words is "three hundred four million, one hundred forty thousand, forty".