304431312140 has 24 divisors (see below), whose sum is σ = 639317096880. Its totient is φ = 121770364608.

The previous prime is 304431312083. The next prime is 304431312169. The reversal of 304431312140 is 41213134403.

It is a happy number.

It is a super-2 number, since 2×304431312140² (a number of 24 digits) contains 22 as substring.

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, 1508531 + ... + 1698389.

It is an arithmetic number, because the mean of its divisors is an integer number (26638212370).

Almost surely, 2^304431312140 is an apocalyptic number.

It is an amenable number.

304431312140 is an abundant number, since it is smaller than the sum of its proper divisors (334885784740).

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

304431312140 is a wasteful number, since it uses less digits than its factorization.

304431312140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270041 (or 270039 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 304431312140 its reverse (41213134403), we get a palindrome (345644446543).

The spelling of 304431312140 in words is "three hundred four billion, four hundred thirty-one million, three hundred twelve thousand, one hundred forty".