27987597 has 12 divisors (see below), whose sum is σ = 44101824. Its totient is φ = 16962120.

The previous prime is 27987587. The next prime is 27987601. The reversal of 27987597 is 79578972.

It is not a de Polignac number, because 27987597 - 2⁸ = 27987341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27987587) 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 11 ways as a sum of consecutive naturals, for example, 141253 + ... + 141450.

It is an arithmetic number, because the mean of its divisors is an integer number (3675152).

Almost surely, 2^27987597 is an apocalyptic number.

It is an amenable number.

27987597 is a deficient number, since it is larger than the sum of its proper divisors (16114227).

27987597 is a wasteful number, since it uses less digits than its factorization.

27987597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282720 (or 282717 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 54.

The square root of 27987597 is about 5290.3305189752. The cubic root of 27987597 is about 303.6140538834.

It can be divided in two parts, 279875 and 97, that added together give a palindrome (279972).

The spelling of 27987597 in words is "twenty-seven million, nine hundred eighty-seven thousand, five hundred ninety-seven".