27863887 has 4 divisors (see below), whose sum is σ = 28543536. Its totient is φ = 27184240.

The previous prime is 27863873. The next prime is 27863921. The reversal of 27863887 is 78836872.

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

It is a cyclic number.

It is not a de Polignac number, because 27863887 - 2¹⁵ = 27831119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27863887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27863807) 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, 339763 + ... + 339844.

It is an arithmetic number, because the mean of its divisors is an integer number (7135884).

Almost surely, 2^27863887 is an apocalyptic number.

27863887 is a deficient number, since it is larger than the sum of its proper divisors (679649).

27863887 is an equidigital number, since it uses as much as digits as its factorization.

27863887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679648.

The product of its digits is 903168, while the sum is 49.

The square root of 27863887 is about 5278.6254839683. The cubic root of 27863887 is about 303.1660510103.

The spelling of 27863887 in words is "twenty-seven million, eight hundred sixty-three thousand, eight hundred eighty-seven".