12528644 has 12 divisors (see below), whose sum is σ = 22517964. Its totient is φ = 6094944.

The previous prime is 12528641. The next prime is 12528653. The reversal of 12528644 is 44682521.

It can be written as a sum of positive squares in 2 ways, for example, as 5569600 + 6959044 = 2360^2 + 2638^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12528644.

It is not an unprimeable number, because it can be changed into a prime (12528641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42179 + ... + 42474.

It is an arithmetic number, because the mean of its divisors is an integer number (1876497).

Almost surely, 2^12528644 is an apocalyptic number.

It is an amenable number.

12528644 is a deficient number, since it is larger than the sum of its proper divisors (9989320).

12528644 is a wasteful number, since it uses less digits than its factorization.

12528644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84694 (or 84692 counting only the distinct ones).

The product of its digits is 15360, while the sum is 32.

The square root of 12528644 is about 3539.5824612516. The cubic root of 12528644 is about 232.2565780064.

The spelling of 12528644 in words is "twelve million, five hundred twenty-eight thousand, six hundred forty-four".