27993387 has 8 divisors (see below), whose sum is σ = 38192704. Its totient is φ = 18228168.

The previous prime is 27993379. The next prime is 27993391. The reversal of 27993387 is 78339972.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27993387 - 2³ = 27993379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27993367) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 108373 + ... + 108630.

It is an arithmetic number, because the mean of its divisors is an integer number (4774088).

Almost surely, 2^27993387 is an apocalyptic number.

27993387 is a deficient number, since it is larger than the sum of its proper divisors (10199317).

27993387 is a wasteful number, since it uses less digits than its factorization.

27993387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217049.

The product of its digits is 571536, while the sum is 48.

The square root of 27993387 is about 5290.8777154646. The cubic root of 27993387 is about 303.6349893971.

The spelling of 27993387 in words is "twenty-seven million, nine hundred ninety-three thousand, three hundred eighty-seven".