12180644 has 24 divisors (see below), whose sum is σ = 25148928. Its totient is φ = 5051520.

The previous prime is 12180631. The next prime is 12180647. The reversal of 12180644 is 44608121.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (12180647) 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, 6149 + ... + 7884.

It is an arithmetic number, because the mean of its divisors is an integer number (1047872).

Almost surely, 2^12180644 is an apocalyptic number.

12180644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12180644 is an abundant number, since it is smaller than the sum of its proper divisors (12968284).

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

12180644 is a wasteful number, since it uses less digits than its factorization.

12180644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14075 (or 14073 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 12180644 is about 3490.0779360925. The cubic root of 12180644 is about 230.0859414182.

Adding to 12180644 its reverse (44608121), we get a palindrome (56788765).

The spelling of 12180644 in words is "twelve million, one hundred eighty thousand, six hundred forty-four".