309431037868 has 12 divisors (see below), whose sum is σ = 544634400240. Its totient is φ = 153821209232.

The previous prime is 309431037863. The next prime is 309431037889. The reversal of 309431037868 is 868730134903.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (309431037863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223576648 + ... + 223578031.

It is an arithmetic number, because the mean of its divisors is an integer number (45386200020).

Almost surely, 2^309431037868 is an apocalyptic number.

It is an amenable number.

309431037868 is a deficient number, since it is larger than the sum of its proper divisors (235203362372).

309431037868 is a wasteful number, since it uses less digits than its factorization.

309431037868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447154856 (or 447154854 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 52.

The spelling of 309431037868 in words is "three hundred nine billion, four hundred thirty-one million, thirty-seven thousand, eight hundred sixty-eight".