27887321 has 24 divisors (see below), whose sum is σ = 36552960. Its totient is φ = 21016800.

The previous prime is 27887317. The next prime is 27887329. The reversal of 27887321 is 12378872.

It is not a de Polignac number, because 27887321 - 2² = 27887317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27887329) 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 23 ways as a sum of consecutive naturals, for example, 15875 + ... + 17543.

It is an arithmetic number, because the mean of its divisors is an integer number (1523040).

Almost surely, 2^27887321 is an apocalyptic number.

It is an amenable number.

27887321 is a deficient number, since it is larger than the sum of its proper divisors (8665639).

27887321 is a wasteful number, since it uses less digits than its factorization.

27887321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1725 (or 1718 counting only the distinct ones).

The product of its digits is 37632, while the sum is 38.

The square root of 27887321 is about 5280.8447240948. The cubic root of 27887321 is about 303.2510164536.

The spelling of 27887321 in words is "twenty-seven million, eight hundred eighty-seven thousand, three hundred twenty-one".