27638816 has 24 divisors (see below), whose sum is σ = 54547920. Its totient is φ = 13785408.

The previous prime is 27638813. The next prime is 27638833. The reversal of 27638816 is 61883672.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (27638813) 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, 16715 + ... + 18293.

It is an arithmetic number, because the mean of its divisors is an integer number (2272830).

Almost surely, 2^27638816 is an apocalyptic number.

It is an amenable number.

27638816 is a deficient number, since it is larger than the sum of its proper divisors (26909104).

27638816 is a wasteful number, since it uses less digits than its factorization.

27638816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136 (or 2128 counting only the distinct ones).

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

The square root of 27638816 is about 5257.2631663252. The cubic root of 27638816 is about 302.3475670316.

The spelling of 27638816 in words is "twenty-seven million, six hundred thirty-eight thousand, eight hundred sixteen".