12388820 has 24 divisors (see below), whose sum is σ = 26460000. Its totient is φ = 4871072.

The previous prime is 12388811. The next prime is 12388841. The reversal of 12388820 is 2888321.

12388820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4070 + ... + 6429.

It is an arithmetic number, because the mean of its divisors is an integer number (1102500).

Almost surely, 2^12388820 is an apocalyptic number.

12388820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12388820 is an abundant number, since it is smaller than the sum of its proper divisors (14071180).

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

12388820 is a wasteful number, since it uses less digits than its factorization.

12388820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10567 (or 10565 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 12388820 is about 3519.7755610266. The cubic root of 12388820 is about 231.3893224242.

The spelling of 12388820 in words is "twelve million, three hundred eighty-eight thousand, eight hundred twenty".