12855638 has 16 divisors (see below), whose sum is σ = 21078144. Its totient is φ = 5854080.

The previous prime is 12855617. The next prime is 12855677. The reversal of 12855638 is 83655821.

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, 5045 + ... + 7152.

It is an arithmetic number, because the mean of its divisors is an integer number (1317384).

Almost surely, 2^12855638 is an apocalyptic number.

12855638 is a deficient number, since it is larger than the sum of its proper divisors (8222506).

12855638 is a wasteful number, since it uses less digits than its factorization.

12855638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12247.

The product of its digits is 57600, while the sum is 38.

The square root of 12855638 is about 3585.4759795598. The cubic root of 12855638 is about 234.2598593675.

The spelling of 12855638 in words is "twelve million, eight hundred fifty-five thousand, six hundred thirty-eight".