12128886 has 64 divisors (see below), whose sum is σ = 33615360. Its totient is φ = 3149280.

The previous prime is 12128869. The next prime is 12128887. The reversal of 12128886 is 68882121.

12128886 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 12128886.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12128887) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2700 + ... + 5616.

It is an arithmetic number, because the mean of its divisors is an integer number (525240).

Almost surely, 2^12128886 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12128886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16807680).

12128886 is an abundant number, since it is smaller than the sum of its proper divisors (21486474).

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

12128886 is a wasteful number, since it uses less digits than its factorization.

12128886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2946 (or 2940 counting only the distinct ones).

The product of its digits is 12288, while the sum is 36.

The square root of 12128886 is about 3482.6550216753. The cubic root of 12128886 is about 229.7595849547.

The spelling of 12128886 in words is "twelve million, one hundred twenty-eight thousand, eight hundred eighty-six".