12089618 has 16 divisors (see below), whose sum is σ = 19566360. Its totient is φ = 5581056.

The previous prime is 12089611. The next prime is 12089633. The reversal of 12089618 is 81698021.

It can be written as a sum of positive squares in 4 ways, for example, as 12061729 + 27889 = 3473^2 + 167^2 .

It is not an unprimeable number, because it can be changed into a prime (12089611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1553 + ... + 5156.

Almost surely, 2^12089618 is an apocalyptic number.

12089618 is a deficient number, since it is larger than the sum of its proper divisors (7476742).

12089618 is a wasteful number, since it uses less digits than its factorization.

12089618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6781.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 12089618 is about 3477.0127983659. The cubic root of 12089618 is about 229.5113633794.

The spelling of 12089618 in words is "twelve million, eighty-nine thousand, six hundred eighteen".