12867638 has 16 divisors (see below), whose sum is σ = 22655904. Its totient is φ = 5365440.

The previous prime is 12867629. The next prime is 12867661. The reversal of 12867638 is 83676821.

It is a happy number.

It is a super-2 number, since 2×12867638² = 331152215398088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12867595 and 12867604.

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, 11903 + ... + 12938.

It is an arithmetic number, because the mean of its divisors is an integer number (1415994).

Almost surely, 2^12867638 is an apocalyptic number.

12867638 is a deficient number, since it is larger than the sum of its proper divisors (9788266).

12867638 is a wasteful number, since it uses less digits than its factorization.

12867638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24887.

The product of its digits is 96768, while the sum is 41.

The square root of 12867638 is about 3587.1490072201. The cubic root of 12867638 is about 234.3327260763.

The spelling of 12867638 in words is "twelve million, eight hundred sixty-seven thousand, six hundred thirty-eight".