28327705 has 16 divisors (see below), whose sum is σ = 39585024. Its totient is φ = 19056960.

The previous prime is 28327703. The next prime is 28327757. The reversal of 28327705 is 50772382.

It is not a de Polignac number, because 28327705 - 2¹ = 28327703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28327703) 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 in 15 ways as a sum of consecutive naturals, for example, 5781 + ... + 9490.

It is an arithmetic number, because the mean of its divisors is an integer number (2474064).

Almost surely, 2^28327705 is an apocalyptic number.

It is an amenable number.

28327705 is a deficient number, since it is larger than the sum of its proper divisors (11257319).

28327705 is a wasteful number, since it uses less digits than its factorization.

28327705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15336.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 28327705 is about 5322.3777581077. The cubic root of 28327705 is about 304.8389546649.

The spelling of 28327705 in words is "twenty-eight million, three hundred twenty-seven thousand, seven hundred five".