27697128 has 16 divisors (see below), whose sum is σ = 69242880. Its totient is φ = 9232368.

The previous prime is 27697093. The next prime is 27697141. The reversal of 27697128 is 82179672.

It is a self number, because there is not a number n which added to its sum of digits gives 27697128.

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, 577000 + ... + 577047.

It is an arithmetic number, because the mean of its divisors is an integer number (4327680).

Almost surely, 2^27697128 is an apocalyptic number.

It is an amenable number.

27697128 is an abundant number, since it is smaller than the sum of its proper divisors (41545752).

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

27697128 is a wasteful number, since it uses less digits than its factorization.

27697128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154056 (or 1154052 counting only the distinct ones).

The product of its digits is 84672, while the sum is 42.

The square root of 27697128 is about 5262.8060956110. The cubic root of 27697128 is about 302.5600472741.

The spelling of 27697128 in words is "twenty-seven million, six hundred ninety-seven thousand, one hundred twenty-eight".