27993189 has 16 divisors (see below), whose sum is σ = 42849920. Its totient is φ = 15923520.

The previous prime is 27993157. The next prime is 27993191. The reversal of 27993189 is 98139972.

It is not a de Polignac number, because 27993189 - 2⁵ = 27993157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27993089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1899 + ... + 7719.

It is an arithmetic number, because the mean of its divisors is an integer number (2678120).

Almost surely, 2^27993189 is an apocalyptic number.

It is an amenable number.

27993189 is a deficient number, since it is larger than the sum of its proper divisors (14856731).

27993189 is a wasteful number, since it uses less digits than its factorization.

27993189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6060.

The product of its digits is 244944, while the sum is 48.

The square root of 27993189 is about 5290.8590039804. The cubic root of 27993189 is about 303.6342735153.

It can be divided in two parts, 27993 and 189, that added together give a palindrome (28182).

The spelling of 27993189 in words is "twenty-seven million, nine hundred ninety-three thousand, one hundred eighty-nine".