27988766 has 24 divisors (see below), whose sum is σ = 48145104. Its totient is φ = 12155520.

The previous prime is 27988703. The next prime is 27988777. The reversal of 27988766 is 66788972.

It is a happy number.

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 in 11 ways as a sum of consecutive naturals, for example, 3311 + ... + 8181.

It is an arithmetic number, because the mean of its divisors is an integer number (2006046).

Almost surely, 2^27988766 is an apocalyptic number.

27988766 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

27988766 is a deficient number, since it is larger than the sum of its proper divisors (20156338).

27988766 is a wasteful number, since it uses less digits than its factorization.

27988766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4916 (or 4903 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 53.

The square root of 27988766 is about 5290.4410024118. The cubic root of 27988766 is about 303.6182809926.

The spelling of 27988766 in words is "twenty-seven million, nine hundred eighty-eight thousand, seven hundred sixty-six".