12307138928 has 20 divisors (see below), whose sum is σ = 27251522160. Its totient is φ = 5274488064.

The previous prime is 12307138927. The next prime is 12307138939. The reversal of 12307138928 is 82983170321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12307138927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54942473 + ... + 54942696.

It is an arithmetic number, because the mean of its divisors is an integer number (1362576108).

Almost surely, 2^12307138928 is an apocalyptic number.

It is an amenable number.

12307138928 is an abundant number, since it is smaller than the sum of its proper divisors (14944383232).

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

12307138928 is a wasteful number, since it uses less digits than its factorization.

12307138928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109885184 (or 109885178 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 12307138928 in words is "twelve billion, three hundred seven million, one hundred thirty-eight thousand, nine hundred twenty-eight".