12523638 has 32 divisors (see below), whose sum is σ = 26353152. Its totient is φ = 3960000.

The previous prime is 12523627. The next prime is 12523639. The reversal of 12523638 is 83632521.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12523639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20538 + ... + 21138.

It is an arithmetic number, because the mean of its divisors is an integer number (823536).

Almost surely, 2^12523638 is an apocalyptic number.

12523638 is an abundant number, since it is smaller than the sum of its proper divisors (13829514).

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

12523638 is a wasteful number, since it uses less digits than its factorization.

12523638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780.

The product of its digits is 8640, while the sum is 30.

The square root of 12523638 is about 3538.8752450461. The cubic root of 12523638 is about 232.2256400661.

The spelling of 12523638 in words is "twelve million, five hundred twenty-three thousand, six hundred thirty-eight".