27978068 has 12 divisors (see below), whose sum is σ = 50285172. Its totient is φ = 13610880.

The previous prime is 27978043. The next prime is 27978091. The reversal of 27978068 is 86087972.

It can be written as a sum of positive squares in 2 ways, for example, as 12517444 + 15460624 = 3538^2 + 3932^2 .

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 in 3 ways as a sum of consecutive naturals, for example, 94373 + ... + 94668.

It is an arithmetic number, because the mean of its divisors is an integer number (4190431).

Almost surely, 2^27978068 is an apocalyptic number.

It is an amenable number.

27978068 is a deficient number, since it is larger than the sum of its proper divisors (22307104).

27978068 is a wasteful number, since it uses less digits than its factorization.

27978068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189082 (or 189080 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 27978068 is about 5289.4298369484. The cubic root of 27978068 is about 303.5795925858.

The spelling of 27978068 in words is "twenty-seven million, nine hundred seventy-eight thousand, sixty-eight".