12128878 has 24 divisors (see below), whose sum is σ = 19504152. Its totient is φ = 5655312.

The previous prime is 12128869. The next prime is 12128887. The reversal of 12128878 is 87882121.

12128878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12128869) and next prime (12128887).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77176 + ... + 77332.

It is an arithmetic number, because the mean of its divisors is an integer number (812673).

Almost surely, 2^12128878 is an apocalyptic number.

12128878 is a deficient number, since it is larger than the sum of its proper divisors (7375274).

12128878 is a wasteful number, since it uses less digits than its factorization.

12128878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304 (or 285 counting only the distinct ones).

The product of its digits is 14336, while the sum is 37.

The square root of 12128878 is about 3482.6538731261. The cubic root of 12128878 is about 229.7595344396.

The spelling of 12128878 in words is "twelve million, one hundred twenty-eight thousand, eight hundred seventy-eight".