27728788 has 6 divisors (see below), whose sum is σ = 48525386. Its totient is φ = 13864392.

The previous prime is 27728773. The next prime is 27728797. The reversal of 27728788 is 88782772.

It can be written as a sum of positive squares in only one way, i.e., 27227524 + 501264 = 5218^2 + 708^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3466095 + ... + 3466102.

Almost surely, 2^27728788 is an apocalyptic number.

It is an amenable number.

27728788 is a deficient number, since it is larger than the sum of its proper divisors (20796598).

27728788 is a wasteful number, since it uses less digits than its factorization.

27728788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6932201 (or 6932199 counting only the distinct ones).

The product of its digits is 702464, while the sum is 49.

The square root of 27728788 is about 5265.8131375885. The cubic root of 27728788 is about 302.6752867019.

The spelling of 27728788 in words is "twenty-seven million, seven hundred twenty-eight thousand, seven hundred eighty-eight".