27813728 has 12 divisors (see below), whose sum is σ = 54758340. Its totient is φ = 13906848.

The previous prime is 27813719. The next prime is 27813757. The reversal of 27813728 is 82731872.

It is a junction number, because it is equal to n+sod(n) for n = 27813691 and 27813700.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 434558 + ... + 434621.

It is an arithmetic number, because the mean of its divisors is an integer number (4563195).

Almost surely, 2^27813728 is an apocalyptic number.

It is an amenable number.

27813728 is a deficient number, since it is larger than the sum of its proper divisors (26944612).

27813728 is an equidigital number, since it uses as much as digits as its factorization.

27813728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869189 (or 869181 counting only the distinct ones).

The product of its digits is 37632, while the sum is 38.

The square root of 27813728 is about 5273.8722017129. The cubic root of 27813728 is about 302.9840275939.

The spelling of 27813728 in words is "twenty-seven million, eight hundred thirteen thousand, seven hundred twenty-eight".