27978112 has 16 divisors (see below), whose sum is σ = 55737900. Its totient is φ = 13988992.

The previous prime is 27978109. The next prime is 27978121. The reversal of 27978112 is 21187972.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109162 + ... + 109417.

Almost surely, 2^27978112 is an apocalyptic number.

It is an amenable number.

27978112 is a deficient number, since it is larger than the sum of its proper divisors (27759788).

27978112 is an equidigital number, since it uses as much as digits as its factorization.

27978112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218593 (or 218581 counting only the distinct ones).

The product of its digits is 14112, while the sum is 37.

The square root of 27978112 is about 5289.4339961852. The cubic root of 27978112 is about 303.5797517283.

The spelling of 27978112 in words is "twenty-seven million, nine hundred seventy-eight thousand, one hundred twelve".