12381788 has 12 divisors (see below), whose sum is σ = 21790440. Its totient is φ = 6155952.

The previous prime is 12381781. The next prime is 12381823. The reversal of 12381788 is 88718321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12381781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7931 + ... + 9362.

It is an arithmetic number, because the mean of its divisors is an integer number (1815870).

Almost surely, 2^12381788 is an apocalyptic number.

It is an amenable number.

12381788 is a deficient number, since it is larger than the sum of its proper divisors (9408652).

12381788 is a wasteful number, since it uses less digits than its factorization.

12381788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17476 (or 17474 counting only the distinct ones).

The product of its digits is 21504, while the sum is 38.

The square root of 12381788 is about 3518.7764919074. The cubic root of 12381788 is about 231.3455346201.

The spelling of 12381788 in words is "twelve million, three hundred eighty-one thousand, seven hundred eighty-eight".