12180688 has 40 divisors (see below), whose sum is σ = 25645928. Its totient is φ = 5571072.

The previous prime is 12180683. The next prime is 12180703. The reversal of 12180688 is 88608121.

It can be written as a sum of positive squares in 4 ways, for example, as 153664 + 12027024 = 392^2 + 3468^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12180683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32470 + ... + 32842.

Almost surely, 2^12180688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12180688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12822964).

12180688 is an abundant number, since it is smaller than the sum of its proper divisors (13465240).

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

12180688 is a wasteful number, since it uses less digits than its factorization.

12180688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551 (or 545 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 34.

The square root of 12180688 is about 3490.0842396710. The cubic root of 12180688 is about 230.0862184635.

The spelling of 12180688 in words is "twelve million, one hundred eighty thousand, six hundred eighty-eight".