12388780 has 24 divisors (see below), whose sum is σ = 26349120. Its totient is φ = 4892160.

The previous prime is 12388763. The next prime is 12388787. The reversal of 12388780 is 8788321.

12388780 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 not an unprimeable number, because it can be changed into a prime (12388787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2341 + ... + 5500.

It is an arithmetic number, because the mean of its divisors is an integer number (1097880).

Almost surely, 2^12388780 is an apocalyptic number.

12388780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12388780 is an abundant number, since it is smaller than the sum of its proper divisors (13960340).

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

12388780 is a wasteful number, since it uses less digits than its factorization.

12388780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7929 (or 7927 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 12388780 is about 3519.7698788415. The cubic root of 12388780 is about 231.3890733936.

The spelling of 12388780 in words is "twelve million, three hundred eighty-eight thousand, seven hundred eighty".