12220878 has 16 divisors (see below), whose sum is σ = 25102800. Its totient is φ = 3963456.

The previous prime is 12220877. The next prime is 12220891. The reversal of 12220878 is 87802221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27303 + ... + 27746.

It is an arithmetic number, because the mean of its divisors is an integer number (1568925).

Almost surely, 2^12220878 is an apocalyptic number.

12220878 is an abundant number, since it is smaller than the sum of its proper divisors (12881922).

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

12220878 is a wasteful number, since it uses less digits than its factorization.

12220878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55091.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 12220878 is about 3495.8372387741. The cubic root of 12220878 is about 230.3389960140.

The spelling of 12220878 in words is "twelve million, two hundred twenty thousand, eight hundred seventy-eight".