27989712 has 120 divisors (see below), whose sum is σ = 85036224. Its totient is φ = 8895744.

The previous prime is 27989711. The next prime is 27989729. The reversal of 27989712 is 21798972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27989711) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89268 + ... + 89580.

Almost surely, 2^27989712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27989712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42518112).

27989712 is an abundant number, since it is smaller than the sum of its proper divisors (57046512).

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

27989712 is a wasteful number, since it uses less digits than its factorization.

27989712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359 (or 341 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 27989712 is about 5290.5304081916. The cubic root of 27989712 is about 303.6217016467.

The spelling of 27989712 in words is "twenty-seven million, nine hundred eighty-nine thousand, seven hundred twelve".