12528638 has 16 divisors (see below), whose sum is σ = 20466000. Its totient is φ = 5729472.

The previous prime is 12528631. The next prime is 12528641. The reversal of 12528638 is 83682521.

It is a junction number, because it is equal to n+sod(n) for n = 12528598 and 12528607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12528631) 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, 4583 + ... + 6786.

It is an arithmetic number, because the mean of its divisors is an integer number (1279125).

Almost surely, 2^12528638 is an apocalyptic number.

12528638 is a deficient number, since it is larger than the sum of its proper divisors (7937362).

12528638 is a wasteful number, since it uses less digits than its factorization.

12528638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11419.

The product of its digits is 23040, while the sum is 35.

The square root of 12528638 is about 3539.5816136939. The cubic root of 12528638 is about 232.2565409303.

The spelling of 12528638 in words is "twelve million, five hundred twenty-eight thousand, six hundred thirty-eight".