12990188 has 6 divisors (see below), whose sum is σ = 22732836. Its totient is φ = 6495092.

The previous prime is 12990181. The next prime is 12990191. The reversal of 12990188 is 88109921.

It is not an unprimeable number, because it can be changed into a prime (12990181) 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 as a sum of consecutive naturals, namely, 1623770 + ... + 1623777.

It is an arithmetic number, because the mean of its divisors is an integer number (3788806).

Almost surely, 2^12990188 is an apocalyptic number.

It is an amenable number.

12990188 is a deficient number, since it is larger than the sum of its proper divisors (9742648).

12990188 is a wasteful number, since it uses less digits than its factorization.

12990188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3247551 (or 3247549 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 38.

The square root of 12990188 is about 3604.1903390359. The cubic root of 12990188 is about 235.0742967134.

The spelling of 12990188 in words is "twelve million, nine hundred ninety thousand, one hundred eighty-eight".