27986089 has 4 divisors (see below), whose sum is σ = 28051156. Its totient is φ = 27921024.

The previous prime is 27986081. The next prime is 27986099. The reversal of 27986089 is 98068972.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8555625 + 19430464 = 2925^2 + 4408^2 .

It is a cyclic number.

It is not a de Polignac number, because 27986089 - 2³ = 27986081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27986081) 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 3 ways as a sum of consecutive naturals, for example, 31884 + ... + 32749.

It is an arithmetic number, because the mean of its divisors is an integer number (7012789).

Almost surely, 2^27986089 is an apocalyptic number.

It is an amenable number.

27986089 is a deficient number, since it is larger than the sum of its proper divisors (65067).

27986089 is an equidigital number, since it uses as much as digits as its factorization.

27986089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65066.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 27986089 is about 5290.1879928789. The cubic root of 27986089 is about 303.6086007748.

It can be divided in two parts, 279 and 86089, that added together give a palindrome (86368).

The spelling of 27986089 in words is "twenty-seven million, nine hundred eighty-six thousand, eighty-nine".