12209388 has 12 divisors (see below), whose sum is σ = 28488600. Its totient is φ = 4069792.

The previous prime is 12209387. The next prime is 12209423. The reversal of 12209388 is 88390221.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (12209387) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 508713 + ... + 508736.

It is an arithmetic number, because the mean of its divisors is an integer number (2374050).

Almost surely, 2^12209388 is an apocalyptic number.

It is an amenable number.

12209388 is an abundant number, since it is smaller than the sum of its proper divisors (16279212).

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

12209388 is a wasteful number, since it uses less digits than its factorization.

12209388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017456 (or 1017454 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 12209388 is about 3494.1934691714. The cubic root of 12209388 is about 230.2667855739.

The spelling of 12209388 in words is "twelve million, two hundred nine thousand, three hundred eighty-eight".