27995728 has 20 divisors (see below), whose sum is σ = 55992448. Its totient is φ = 13546080.

The previous prime is 27995711. The next prime is 27995729. The reversal of 27995728 is 82759972.

27995728 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27995729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27726 + ... + 28717.

Almost surely, 2^27995728 is an apocalyptic number.

It is an amenable number.

27995728 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

27995728 is a wasteful number, since it uses less digits than its factorization.

27995728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56482 (or 56476 counting only the distinct ones).

The product of its digits is 635040, while the sum is 49.

The square root of 27995728 is about 5291.0989406739. The cubic root of 27995728 is about 303.6434531782.

The spelling of 27995728 in words is "twenty-seven million, nine hundred ninety-five thousand, seven hundred twenty-eight".