28886705 has 8 divisors (see below), whose sum is σ = 35152704. Its totient is φ = 22783600.

The previous prime is 28886687. The next prime is 28886719. The reversal of 28886705 is 50768882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28886705 - 2⁸ = 28886449 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 40331 + ... + 41040.

It is an arithmetic number, because the mean of its divisors is an integer number (4394088).

Almost surely, 2^28886705 is an apocalyptic number.

It is an amenable number.

28886705 is a deficient number, since it is larger than the sum of its proper divisors (6265999).

28886705 is an equidigital number, since it uses as much as digits as its factorization.

28886705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81447.

The product of its (nonzero) digits is 215040, while the sum is 44.

The square root of 28886705 is about 5374.6353364670. The cubic root of 28886705 is about 306.8310706112.

The spelling of 28886705 in words is "twenty-eight million, eight hundred eighty-six thousand, seven hundred five".