27638916 has 48 divisors (see below), whose sum is σ = 67737600. Its totient is φ = 8754592.

The previous prime is 27638909. The next prime is 27638921. The reversal of 27638916 is 61983672.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65755 + ... + 66173.

It is an arithmetic number, because the mean of its divisors is an integer number (1411200).

Almost surely, 2^27638916 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27638916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33868800).

27638916 is an abundant number, since it is smaller than the sum of its proper divisors (40098684).

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

27638916 is a wasteful number, since it uses less digits than its factorization.

27638916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688 (or 686 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 27638916 is about 5257.2726769685. The cubic root of 27638916 is about 302.3479316724.

The spelling of 27638916 in words is "twenty-seven million, six hundred thirty-eight thousand, nine hundred sixteen".