309130303920 has 80 divisors (see below), whose sum is σ = 963168576480. Its totient is φ = 82016284672.

The previous prime is 309130303907. The next prime is 309130303949. The reversal of 309130303920 is 29303031903.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

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, 3221865 + ... + 3316424.

It is an arithmetic number, because the mean of its divisors is an integer number (12039607206).

Almost surely, 2^309130303920 is an apocalyptic number.

309130303920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

309130303920 is an abundant number, since it is smaller than the sum of its proper divisors (654038272560).

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

309130303920 is a wasteful number, since it uses less digits than its factorization.

309130303920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6538502 (or 6538496 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 33.

The spelling of 309130303920 in words is "three hundred nine billion, one hundred thirty million, three hundred three thousand, nine hundred twenty".