27928687 has 2 divisors, whose sum is σ = 27928688. Its totient is φ = 27928686.

The previous prime is 27928679. The next prime is 27928699. The reversal of 27928687 is 78682972.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27928687 - 2³ = 27928679 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27928687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27928657) 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 as a sum of consecutive naturals, namely, 13964343 + 13964344.

It is an arithmetic number, because the mean of its divisors is an integer number (13964344).

Almost surely, 2^27928687 is an apocalyptic number.

27928687 is a deficient number, since it is larger than the sum of its proper divisors (1).

27928687 is an equidigital number, since it uses as much as digits as its factorization.

27928687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 49.

The square root of 27928687 is about 5284.7598810164. The cubic root of 27928687 is about 303.4008824594.

The spelling of 27928687 in words is "twenty-seven million, nine hundred twenty-eight thousand, six hundred eighty-seven".