27290887 has 4 divisors (see below), whose sum is σ = 29390200. Its totient is φ = 25191576.

The previous prime is 27290873. The next prime is 27290891. The reversal of 27290887 is 78809272.

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 27290887 - 2⁷ = 27290759 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 (27290807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1049637 + ... + 1049662.

It is an arithmetic number, because the mean of its divisors is an integer number (7347550).

Almost surely, 2^27290887 is an apocalyptic number.

27290887 is a deficient number, since it is larger than the sum of its proper divisors (2099313).

27290887 is a wasteful number, since it uses less digits than its factorization.

27290887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2099312.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 27290887 is about 5224.0680508584. The cubic root of 27290887 is about 301.0735132416.

The spelling of 27290887 in words is "twenty-seven million, two hundred ninety thousand, eight hundred eighty-seven".