28540389727 has 2 divisors, whose sum is σ = 28540389728. Its totient is φ = 28540389726.

The previous prime is 28540389677. The next prime is 28540389733. The reversal of 28540389727 is 72798304582.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28540389727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28540389797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14270194863 + 14270194864.

It is an arithmetic number, because the mean of its divisors is an integer number (14270194864).

Almost surely, 2^28540389727 is an apocalyptic number.

28540389727 is a deficient number, since it is larger than the sum of its proper divisors (1).

28540389727 is an equidigital number, since it uses as much as digits as its factorization.

28540389727 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6773760, while the sum is 55.

The spelling of 28540389727 in words is "twenty-eight billion, five hundred forty million, three hundred eighty-nine thousand, seven hundred twenty-seven".