12228378 has 16 divisors (see below), whose sum is σ = 24507360. Its totient is φ = 4067696.

The previous prime is 12228367. The next prime is 12228397. The reversal of 12228378 is 87382221.

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 7 ways as a sum of consecutive naturals, for example, 1513 + ... + 5171.

It is an arithmetic number, because the mean of its divisors is an integer number (1531710).

Almost surely, 2^12228378 is an apocalyptic number.

12228378 is an abundant number, since it is smaller than the sum of its proper divisors (12278982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12228378 is a wasteful number, since it uses less digits than its factorization.

12228378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4221.

The product of its digits is 10752, while the sum is 33.

The square root of 12228378 is about 3496.9097786474. The cubic root of 12228378 is about 230.3861063550.

The spelling of 12228378 in words is "twelve million, two hundred twenty-eight thousand, three hundred seventy-eight".