27686172 has 12 divisors (see below), whose sum is σ = 64601096. Its totient is φ = 9228720.

The previous prime is 27686129. The next prime is 27686179. The reversal of 27686172 is 27168672.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 27686172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27686179) 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 3 ways as a sum of consecutive naturals, for example, 1153579 + ... + 1153602.

Almost surely, 2^27686172 is an apocalyptic number.

It is an amenable number.

27686172 is an abundant number, since it is smaller than the sum of its proper divisors (36914924).

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

27686172 is a wasteful number, since it uses less digits than its factorization.

27686172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2307188 (or 2307186 counting only the distinct ones).

The product of its digits is 56448, while the sum is 39.

The square root of 27686172 is about 5261.7651030809. The cubic root of 27686172 is about 302.5201480103.

The spelling of 27686172 in words is "twenty-seven million, six hundred eighty-six thousand, one hundred seventy-two".