27243887 has 4 divisors (see below), whose sum is σ = 29720616. Its totient is φ = 24767160.

The previous prime is 27243871. The next prime is 27243889. The reversal of 27243887 is 78834272.

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

It is not a de Polignac number, because 27243887 - 2⁴ = 27243871 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 (27243889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1238348 + ... + 1238369.

It is an arithmetic number, because the mean of its divisors is an integer number (7430154).

Almost surely, 2^27243887 is an apocalyptic number.

27243887 is a deficient number, since it is larger than the sum of its proper divisors (2476729).

27243887 is a wasteful number, since it uses less digits than its factorization.

27243887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2476728.

The product of its digits is 150528, while the sum is 41.

The square root of 27243887 is about 5219.5677024060. The cubic root of 27243887 is about 300.9005790048.

The spelling of 27243887 in words is "twenty-seven million, two hundred forty-three thousand, eight hundred eighty-seven".