27987028 has 12 divisors (see below), whose sum is σ = 49189140. Its totient is φ = 13932992.

The previous prime is 27987013. The next prime is 27987031. The reversal of 27987028 is 82078972.

It can be written as a sum of positive squares in 2 ways, for example, as 18818244 + 9168784 = 4338^2 + 3028^2 .

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 in 3 ways as a sum of consecutive naturals, for example, 14083 + ... + 15946.

It is an arithmetic number, because the mean of its divisors is an integer number (4099095).

Almost surely, 2^27987028 is an apocalyptic number.

It is an amenable number.

27987028 is a deficient number, since it is larger than the sum of its proper divisors (21202112).

27987028 is a wasteful number, since it uses less digits than its factorization.

27987028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30266 (or 30264 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 27987028 is about 5290.2767413435. The cubic root of 27987028 is about 303.6119963343.

The spelling of 27987028 in words is "twenty-seven million, nine hundred eighty-seven thousand, twenty-eight".