12688222 has 8 divisors (see below), whose sum is σ = 20151936. Its totient is φ = 5970912.

The previous prime is 12688217. The next prime is 12688237. The reversal of 12688222 is 22288621.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 186558 + ... + 186625.

It is an arithmetic number, because the mean of its divisors is an integer number (2518992).

Almost surely, 2^12688222 is an apocalyptic number.

12688222 is a deficient number, since it is larger than the sum of its proper divisors (7463714).

12688222 is a wasteful number, since it uses less digits than its factorization.

12688222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373202.

The product of its digits is 6144, while the sum is 31.

The square root of 12688222 is about 3562.0530596834. The cubic root of 12688222 is about 233.2385088617.

The spelling of 12688222 in words is "twelve million, six hundred eighty-eight thousand, two hundred twenty-two".