27989244 has 18 divisors (see below), whose sum is σ = 70750680. Its totient is φ = 9329736.

The previous prime is 27989239. The next prime is 27989251. The reversal of 27989244 is 44298972.

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 27989244.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 388704 + ... + 388775.

Almost surely, 2^27989244 is an apocalyptic number.

It is an amenable number.

27989244 is an abundant number, since it is smaller than the sum of its proper divisors (42761436).

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

27989244 is a wasteful number, since it uses less digits than its factorization.

27989244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777489 (or 777484 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 27989244 is about 5290.4861780369. The cubic root of 27989244 is about 303.6200094089.

It can be divided in two parts, 279892 and 44, that added together give a 7-th power (279936 = 6⁷).

The spelling of 27989244 in words is "twenty-seven million, nine hundred eighty-nine thousand, two hundred forty-four".