27681604 has 24 divisors (see below), whose sum is σ = 50843520. Its totient is φ = 13161984.

The previous prime is 27681571. The next prime is 27681671. The reversal of 27681604 is 40618672.

It is a self number, because there is not a number n which added to its sum of digits gives 27681604.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 16977 + ... + 18535.

It is an arithmetic number, because the mean of its divisors is an integer number (2118480).

Almost surely, 2^27681604 is an apocalyptic number.

It is an amenable number.

27681604 is a deficient number, since it is larger than the sum of its proper divisors (23161916).

27681604 is a wasteful number, since it uses less digits than its factorization.

27681604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1779 (or 1777 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 27681604 is about 5261.3310103053. The cubic root of 27681604 is about 302.5035092824.

The spelling of 27681604 in words is "twenty-seven million, six hundred eighty-one thousand, six hundred four".