27128988 has 18 divisors (see below), whose sum is σ = 68576144. Its totient is φ = 9042984.

The previous prime is 27128987. The next prime is 27129013. The reversal of 27128988 is 88982172.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27128987) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 376756 + ... + 376827.

Almost surely, 2^27128988 is an apocalyptic number.

It is an amenable number.

27128988 is an abundant number, since it is smaller than the sum of its proper divisors (41447156).

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

27128988 is a wasteful number, since it uses less digits than its factorization.

27128988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753593 (or 753588 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 27128988 is about 5208.5495101804. The cubic root of 27128988 is about 300.4769745823.

The spelling of 27128988 in words is "twenty-seven million, one hundred twenty-eight thousand, nine hundred eighty-eight".