28339687 has 2 divisors, whose sum is σ = 28339688. Its totient is φ = 28339686.

The previous prime is 28339679. The next prime is 28339711. The reversal of 28339687 is 78693382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28339687 - 2³ = 28339679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28339667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14169843 + 14169844.

It is an arithmetic number, because the mean of its divisors is an integer number (14169844).

Almost surely, 2^28339687 is an apocalyptic number.

28339687 is a deficient number, since it is larger than the sum of its proper divisors (1).

28339687 is an equidigital number, since it uses as much as digits as its factorization.

28339687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 46.

The square root of 28339687 is about 5323.5032638292. The cubic root of 28339687 is about 304.8819286779.

The spelling of 28339687 in words is "twenty-eight million, three hundred thirty-nine thousand, six hundred eighty-seven".