27813686 has 4 divisors (see below), whose sum is σ = 41720532. Its totient is φ = 13906842.

The previous prime is 27813671. The next prime is 27813691. The reversal of 27813686 is 68631872.

It is a happy number.

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

It is a super-2 number, since 2×27813686² = 1547202257813192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 6953420 + ... + 6953423.

It is an arithmetic number, because the mean of its divisors is an integer number (10430133).

Almost surely, 2^27813686 is an apocalyptic number.

27813686 is a deficient number, since it is larger than the sum of its proper divisors (13906846).

27813686 is a wasteful number, since it uses less digits than its factorization.

27813686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13906845.

The product of its digits is 96768, while the sum is 41.

The square root of 27813686 is about 5273.8682198174. The cubic root of 27813686 is about 302.9838750872.

The spelling of 27813686 in words is "twenty-seven million, eight hundred thirteen thousand, six hundred eighty-six".