27989549 has 16 divisors (see below), whose sum is σ = 32716800. Its totient is φ = 23451120.

The previous prime is 27989543. The next prime is 27989561. The reversal of 27989549 is 94598972.

It is not a de Polignac number, because 27989549 - 2¹² = 27985453 is a prime.

Its product of digits (1632960) is a multiple of the sum of its prime divisors (560).

It is a self number, because there is not a number n which added to its sum of digits gives 27989549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27989543) 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 in 15 ways as a sum of consecutive naturals, for example, 98762 + ... + 99044.

It is an arithmetic number, because the mean of its divisors is an integer number (2044800).

Almost surely, 2^27989549 is an apocalyptic number.

It is an amenable number.

27989549 is a deficient number, since it is larger than the sum of its proper divisors (4727251).

27989549 is a wasteful number, since it uses less digits than its factorization.

27989549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560.

The product of its digits is 1632960, while the sum is 53.

The square root of 27989549 is about 5290.5150032865. The cubic root of 27989549 is about 303.6211122583.

The spelling of 27989549 in words is "twenty-seven million, nine hundred eighty-nine thousand, five hundred forty-nine".