12220378 has 16 divisors (see below), whose sum is σ = 19051200. Its totient is φ = 5874400.

The previous prime is 12220361. The next prime is 12220393. The reversal of 12220378 is 87302221.

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, 4773 + ... + 6871.

It is an arithmetic number, because the mean of its divisors is an integer number (1190700).

Almost surely, 2^12220378 is an apocalyptic number.

12220378 is a deficient number, since it is larger than the sum of its proper divisors (6830822).

12220378 is a wasteful number, since it uses less digits than its factorization.

12220378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2213.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 12220378 is about 3495.7657244158. The cubic root of 12220378 is about 230.3358546393.

Adding to 12220378 its reverse (87302221), we get a palindrome (99522599).

The spelling of 12220378 in words is "twelve million, two hundred twenty thousand, three hundred seventy-eight".