27988039 has 4 divisors (see below), whose sum is σ = 28244920. Its totient is φ = 27731160.

The previous prime is 27987991. The next prime is 27988043. The reversal of 27988039 is 93088972.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27988039 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27988039.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27988049) by changing a digit.

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, 128277 + ... + 128494.

It is an arithmetic number, because the mean of its divisors is an integer number (7061230).

Almost surely, 2^27988039 is an apocalyptic number.

27988039 is a deficient number, since it is larger than the sum of its proper divisors (256881).

27988039 is a wasteful number, since it uses less digits than its factorization.

27988039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256880.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 27988039 is about 5290.3722931378. The cubic root of 27988039 is about 303.6156521712.

The spelling of 27988039 in words is "twenty-seven million, nine hundred eighty-eight thousand, thirty-nine".