27887391 has 24 divisors (see below), whose sum is σ = 46261280. Its totient is φ = 15857856.

The previous prime is 27887389. The next prime is 27887393. The reversal of 27887391 is 19378872.

It is an interprime number because it is at equal distance from previous prime (27887389) and next prime (27887393).

It is not a de Polignac number, because 27887391 - 2¹ = 27887389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27887393) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13461 + ... + 15393.

Almost surely, 2^27887391 is an apocalyptic number.

27887391 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

27887391 is a deficient number, since it is larger than the sum of its proper divisors (18373889).

27887391 is a wasteful number, since it uses less digits than its factorization.

27887391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2175 (or 2172 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 27887391 is about 5280.8513518182. The cubic root of 27887391 is about 303.2512701836.

The spelling of 27887391 in words is "twenty-seven million, eight hundred eighty-seven thousand, three hundred ninety-one".