27885728 has 24 divisors (see below), whose sum is σ = 59123988. Its totient is φ = 12870144.

The previous prime is 27885727. The next prime is 27885743. The reversal of 27885728 is 82758872.

It can be written as a sum of positive squares in 2 ways, for example, as 21270544 + 6615184 = 4612^2 + 2572^2 .

It is a super-2 number, since 2×27885728² = 1555227652179968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27885727) 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, 33101 + ... + 33932.

Almost surely, 2^27885728 is an apocalyptic number.

It is an amenable number.

27885728 is an abundant number, since it is smaller than the sum of its proper divisors (31238260).

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

27885728 is a wasteful number, since it uses less digits than its factorization.

27885728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67056 (or 67048 counting only the distinct ones).

The product of its digits is 501760, while the sum is 47.

The square root of 27885728 is about 5280.6938937984. The cubic root of 27885728 is about 303.2452421680.

The spelling of 27885728 in words is "twenty-seven million, eight hundred eighty-five thousand, seven hundred twenty-eight".