12863638 has 16 divisors (see below), whose sum is σ = 19725984. Its totient is φ = 6289920.

The previous prime is 12863633. The next prime is 12863657. The reversal of 12863638 is 83636821.

It is a junction number, because it is equal to n+sod(n) for n = 12863597 and 12863606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12863633) 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, 22006 + ... + 22582.

It is an arithmetic number, because the mean of its divisors is an integer number (1232874).

Almost surely, 2^12863638 is an apocalyptic number.

12863638 is a deficient number, since it is larger than the sum of its proper divisors (6862346).

12863638 is a wasteful number, since it uses less digits than its factorization.

12863638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807.

The product of its digits is 41472, while the sum is 37.

The square root of 12863638 is about 3586.5914180458. The cubic root of 12863638 is about 234.3084422089.

The spelling of 12863638 in words is "twelve million, eight hundred sixty-three thousand, six hundred thirty-eight".