12638144 has 28 divisors (see below), whose sum is σ = 25240488. Its totient is φ = 6278400.

The previous prime is 12638099. The next prime is 12638147. The reversal of 12638144 is 44183621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12638147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11039 + ... + 12129.

It is an arithmetic number, because the mean of its divisors is an integer number (901446).

Almost surely, 2^12638144 is an apocalyptic number.

It is an amenable number.

12638144 is a deficient number, since it is larger than the sum of its proper divisors (12602344).

12638144 is a wasteful number, since it uses less digits than its factorization.

12638144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284 (or 1274 counting only the distinct ones).

The product of its digits is 4608, while the sum is 29.

The square root of 12638144 is about 3555.0167369508. The cubic root of 12638144 is about 232.9312549315.

The spelling of 12638144 in words is "twelve million, six hundred thirty-eight thousand, one hundred forty-four".