309992431086924 has 96 divisors (see below), whose sum is σ = 762420139536384. Its totient is φ = 97840432008000.

The previous prime is 309992431086917. The next prime is 309992431086937. The reversal of 309992431086924 is 429680134299903.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2434224 + ... + 25018199.

It is an arithmetic number, because the mean of its divisors is an integer number (7941876453504).

Almost surely, 2^{309992431086924} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 309992431086924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (381210069768192).

309992431086924 is an abundant number, since it is smaller than the sum of its proper divisors (452427708449460).

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

309992431086924 is a wasteful number, since it uses less digits than its factorization.

309992431086924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27452867 (or 27452865 counting only the distinct ones).

The product of its (nonzero) digits is 181398528, while the sum is 69.

The spelling of 309992431086924 in words is "three hundred nine trillion, nine hundred ninety-two billion, four hundred thirty-one million, eighty-six thousand, nine hundred twenty-four".