12957638 has 16 divisors (see below), whose sum is σ = 20684160. Its totient is φ = 6066816.

The previous prime is 12957619. The next prime is 12957649. The reversal of 12957638 is 83675921.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12957595 and 12957604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6728 + ... + 8436.

It is an arithmetic number, because the mean of its divisors is an integer number (1292760).

Almost surely, 2^12957638 is an apocalyptic number.

12957638 is a deficient number, since it is larger than the sum of its proper divisors (7726522).

12957638 is a wasteful number, since it uses less digits than its factorization.

12957638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1951.

The product of its digits is 90720, while the sum is 41.

The square root of 12957638 is about 3599.6719294958. The cubic root of 12957638 is about 234.8777876689.

The spelling of 12957638 in words is "twelve million, nine hundred fifty-seven thousand, six hundred thirty-eight".