27687213 has 12 divisors (see below), whose sum is σ = 40367808. Its totient is φ = 18285000.

The previous prime is 27687197. The next prime is 27687299. The reversal of 27687213 is 31278672.

It is not a de Polignac number, because 27687213 - 2⁴ = 27687197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27687613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13413 + ... + 15338.

It is an arithmetic number, because the mean of its divisors is an integer number (3363984).

Almost surely, 2^27687213 is an apocalyptic number.

It is an amenable number.

27687213 is a deficient number, since it is larger than the sum of its proper divisors (12680595).

27687213 is a wasteful number, since it uses less digits than its factorization.

27687213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28864 (or 28861 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 27687213 is about 5261.8640233286. The cubic root of 27687213 is about 302.5239395484.

The spelling of 27687213 in words is "twenty-seven million, six hundred eighty-seven thousand, two hundred thirteen".