28647727 has 2 divisors, whose sum is σ = 28647728. Its totient is φ = 28647726.

The previous prime is 28647721. The next prime is 28647733. The reversal of 28647727 is 72774682.

It is a balanced prime because it is at equal distance from previous prime (28647721) and next prime (28647733).

It is a cyclic number.

It is not a de Polignac number, because 28647727 - 2⁷ = 28647599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28647721) 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, 14323863 + 14323864.

It is an arithmetic number, because the mean of its divisors is an integer number (14323864).

Almost surely, 2^28647727 is an apocalyptic number.

28647727 is a deficient number, since it is larger than the sum of its proper divisors (1).

28647727 is an equidigital number, since it uses as much as digits as its factorization.

28647727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 263424, while the sum is 43.

The square root of 28647727 is about 5352.3571442870. The cubic root of 28647727 is about 305.9825947353.

The spelling of 28647727 in words is "twenty-eight million, six hundred forty-seven thousand, seven hundred twenty-seven".