28004585 has 8 divisors (see below), whose sum is σ = 38406336. Its totient is φ = 19203120.

The previous prime is 28004539. The next prime is 28004591. The reversal of 28004585 is 58540082.

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

It is not a de Polignac number, because 28004585 - 2⁶ = 28004521 is a prime.

It is a Duffinian number.

It is a Curzon 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, 400031 + ... + 400100.

It is an arithmetic number, because the mean of its divisors is an integer number (4800792).

Almost surely, 2^28004585 is an apocalyptic number.

It is an amenable number.

28004585 is a deficient number, since it is larger than the sum of its proper divisors (10401751).

28004585 is an equidigital number, since it uses as much as digits as its factorization.

28004585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800143.

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 28004585 is about 5291.9358461720. The cubic root of 28004585 is about 303.6754709978.

The spelling of 28004585 in words is "twenty-eight million, four thousand, five hundred eighty-five".