12638574 has 24 divisors (see below), whose sum is σ = 29490552. Its totient is φ = 3888720.

The previous prime is 12638551. The next prime is 12638581. The reversal of 12638574 is 47583621.

12638574 is a `hidden beast` number, since 12 + 638 + 5 + 7 + 4 = 666.

12638574 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26772 + ... + 27239.

It is an arithmetic number, because the mean of its divisors is an integer number (1228773).

Almost surely, 2^12638574 is an apocalyptic number.

12638574 is an abundant number, since it is smaller than the sum of its proper divisors (16851978).

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

12638574 is a wasteful number, since it uses less digits than its factorization.

12638574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54032 (or 54029 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 12638574 is about 3555.0772143513. The cubic root of 12638574 is about 232.9338966513.

The spelling of 12638574 in words is "twelve million, six hundred thirty-eight thousand, five hundred seventy-four".