12638222 has 4 divisors (see below), whose sum is σ = 18957336. Its totient is φ = 6319110.

The previous prime is 12638207. The next prime is 12638233. The reversal of 12638222 is 22283621.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 12638191 and 12638200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3159554 + ... + 3159557.

It is an arithmetic number, because the mean of its divisors is an integer number (4739334).

Almost surely, 2^12638222 is an apocalyptic number.

12638222 is a deficient number, since it is larger than the sum of its proper divisors (6319114).

12638222 is an equidigital number, since it uses as much as digits as its factorization.

12638222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6319113.

The product of its digits is 2304, while the sum is 26.

The square root of 12638222 is about 3555.0277073463. The cubic root of 12638222 is about 232.9317341316.

The spelling of 12638222 in words is "twelve million, six hundred thirty-eight thousand, two hundred twenty-two".