12188780 has 24 divisors (see below), whose sum is σ = 26193552. Its totient is φ = 4761792.

The previous prime is 12188749. The next prime is 12188789. The reversal of 12188780 is 8788121.

It is a self number, because there is not a number n which added to its sum of digits gives 12188780.

It is not an unprimeable number, because it can be changed into a prime (12188789) 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, 6227 + ... + 7946.

It is an arithmetic number, because the mean of its divisors is an integer number (1091398).

Almost surely, 2^12188780 is an apocalyptic number.

12188780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12188780 is an abundant number, since it is smaller than the sum of its proper divisors (14004772).

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

12188780 is a wasteful number, since it uses less digits than its factorization.

12188780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14225 (or 14223 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 35.

The square root of 12188780 is about 3491.2433315368. The cubic root of 12188780 is about 230.1371582664.

The spelling of 12188780 in words is "twelve million, one hundred eighty-eight thousand, seven hundred eighty".