27808256 has 40 divisors (see below), whose sum is σ = 63507840. Its totient is φ = 11916288.

The previous prime is 27808247. The next prime is 27808279. The reversal of 27808256 is 65280872.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296 + ... + 7463.

It is an arithmetic number, because the mean of its divisors is an integer number (1587696).

Almost surely, 2^27808256 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 27808256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31753920).

27808256 is an abundant number, since it is smaller than the sum of its proper divisors (35699584).

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

27808256 is an frugal number, since it uses more digits than its factorization.

27808256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7784 (or 7768 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 27808256 is about 5273.3533922922. The cubic root of 27808256 is about 302.9641568627.

The spelling of 27808256 in words is "twenty-seven million, eight hundred eight thousand, two hundred fifty-six".