12187878828 has 12 divisors (see below), whose sum is σ = 28438383960. Its totient is φ = 4062626272.

The previous prime is 12187878809. The next prime is 12187878841. The reversal of 12187878828 is 82887878121.

12187878828 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 507828273 + ... + 507828296.

It is an arithmetic number, because the mean of its divisors is an integer number (2369865330).

Almost surely, 2^12187878828 is an apocalyptic number.

It is an amenable number.

12187878828 is an abundant number, since it is smaller than the sum of its proper divisors (16250505132).

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

12187878828 is a wasteful number, since it uses less digits than its factorization.

12187878828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015656576 (or 1015656574 counting only the distinct ones).

The product of its digits is 6422528, while the sum is 60.

The spelling of 12187878828 in words is "twelve billion, one hundred eighty-seven million, eight hundred seventy-eight thousand, eight hundred twenty-eight".