12212788 has 12 divisors (see below), whose sum is σ = 24425632. Its totient is φ = 5234040.

The previous prime is 12212779. The next prime is 12212797. The reversal of 12212788 is 88721221.

12212788 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12212779) and next prime (12212797).

12212788 is an admirable number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218058 + ... + 218113.

Almost surely, 2^12212788 is an apocalyptic number.

It is an amenable number.

12212788 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12212788 is a wasteful number, since it uses less digits than its factorization.

12212788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436182 (or 436180 counting only the distinct ones).

The product of its digits is 3584, while the sum is 31.

The square root of 12212788 is about 3494.6799567342. The cubic root of 12212788 is about 230.2881580459.

The spelling of 12212788 in words is "twelve million, two hundred twelve thousand, seven hundred eighty-eight".