12378971428 has 48 divisors (see below), whose sum is σ = 22949781120. Its totient is φ = 5826207744.

The previous prime is 12378971383. The next prime is 12378971431. The reversal of 12378971428 is 82417987321.

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, 14511850 + ... + 14512702.

It is an arithmetic number, because the mean of its divisors is an integer number (478120440).

Almost surely, 2^12378971428 is an apocalyptic number.

It is an amenable number.

12378971428 is a deficient number, since it is larger than the sum of its proper divisors (10570809692).

12378971428 is a wasteful number, since it uses less digits than its factorization.

12378971428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1876 (or 1874 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 52.

The spelling of 12378971428 in words is "twelve billion, three hundred seventy-eight million, nine hundred seventy-one thousand, four hundred twenty-eight".