28390727 has 2 divisors, whose sum is σ = 28390728. Its totient is φ = 28390726.

The previous prime is 28390721. The next prime is 28390759. The reversal of 28390727 is 72709382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28390727 - 2⁸ = 28390471 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28390721) 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, 14195363 + 14195364.

It is an arithmetic number, because the mean of its divisors is an integer number (14195364).

Almost surely, 2^28390727 is an apocalyptic number.

28390727 is a deficient number, since it is larger than the sum of its proper divisors (1).

28390727 is an equidigital number, since it uses as much as digits as its factorization.

28390727 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 28390727 is about 5328.2949430376. The cubic root of 28390727 is about 305.0648504940.

The spelling of 28390727 in words is "twenty-eight million, three hundred ninety thousand, seven hundred twenty-seven".