27728812 has 12 divisors (see below), whose sum is σ = 48562416. Its totient is φ = 13853840.

The previous prime is 27728803. The next prime is 27728839. The reversal of 27728812 is 21882772.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8262 + ... + 11122.

It is an arithmetic number, because the mean of its divisors is an integer number (4046868).

Almost surely, 2^27728812 is an apocalyptic number.

It is an amenable number.

27728812 is a deficient number, since it is larger than the sum of its proper divisors (20833604).

27728812 is a wasteful number, since it uses less digits than its factorization.

27728812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5288 (or 5286 counting only the distinct ones).

The product of its digits is 25088, while the sum is 37.

The square root of 27728812 is about 5265.8154164384. The cubic root of 27728812 is about 302.6753740263.

The spelling of 27728812 in words is "twenty-seven million, seven hundred twenty-eight thousand, eight hundred twelve".