12224638 has 32 divisors (see below), whose sum is σ = 20528640. Its totient is φ = 5433120.

The previous prime is 12224629. The next prime is 12224651. The reversal of 12224638 is 83642221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61956 + ... + 62152.

It is an arithmetic number, because the mean of its divisors is an integer number (641520).

Almost surely, 2^12224638 is an apocalyptic number.

12224638 is a deficient number, since it is larger than the sum of its proper divisors (8304002).

12224638 is a wasteful number, since it uses less digits than its factorization.

12224638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312.

The product of its digits is 4608, while the sum is 28.

The square root of 12224638 is about 3496.3749798899. The cubic root of 12224638 is about 230.3626164068.

Adding to 12224638 its reverse (83642221), we get a palindrome (95866859).

The spelling of 12224638 in words is "twelve million, two hundred twenty-four thousand, six hundred thirty-eight".