12218878 has 16 divisors (see below), whose sum is σ = 21006720. Its totient is φ = 5221656.

The previous prime is 12218873. The next prime is 12218891. The reversal of 12218878 is 87881221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12218873) 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, 4825 + ... + 6907.

It is an arithmetic number, because the mean of its divisors is an integer number (1312920).

Almost surely, 2^12218878 is an apocalyptic number.

12218878 is a deficient number, since it is larger than the sum of its proper divisors (8787842).

12218878 is a wasteful number, since it uses less digits than its factorization.

12218878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2511.

The product of its digits is 14336, while the sum is 37.

The square root of 12218878 is about 3495.5511725621. The cubic root of 12218878 is about 230.3264300013.

The spelling of 12218878 in words is "twelve million, two hundred eighteen thousand, eight hundred seventy-eight".