27864213 has 12 divisors (see below), whose sum is σ = 40230720. Its totient is φ = 17146896.

The previous prime is 27864211. The next prime is 27864227. The reversal of 27864213 is 31246872.

It is not a de Polignac number, because 27864213 - 2¹ = 27864211 is a prime.

It is a super-2 number, since 2×27864213² = 1552828732218738, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27864211) 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, 26973 + ... + 27986.

It is an arithmetic number, because the mean of its divisors is an integer number (3352560).

Almost surely, 2^27864213 is an apocalyptic number.

It is an amenable number.

27864213 is a deficient number, since it is larger than the sum of its proper divisors (12366507).

27864213 is a wasteful number, since it uses less digits than its factorization.

27864213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54988 (or 54975 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 27864213 is about 5278.6563631288. The cubic root of 27864213 is about 303.1672333262.

The spelling of 27864213 in words is "twenty-seven million, eight hundred sixty-four thousand, two hundred thirteen".