28575805 has 8 divisors (see below), whose sum is σ = 34624512. Its totient is φ = 22638288.

The previous prime is 28575763. The next prime is 28575839. The reversal of 28575805 is 50857582.

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

It is a cyclic number.

It is not a de Polignac number, because 28575805 - 2¹¹ = 28573757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27229 + ... + 28258.

It is an arithmetic number, because the mean of its divisors is an integer number (4328064).

Almost surely, 2^28575805 is an apocalyptic number.

It is an amenable number.

28575805 is a deficient number, since it is larger than the sum of its proper divisors (6048707).

28575805 is a wasteful number, since it uses less digits than its factorization.

28575805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55595.

The product of its (nonzero) digits is 112000, while the sum is 40.

The square root of 28575805 is about 5345.6341999804. The cubic root of 28575805 is about 305.7263170152.

The spelling of 28575805 in words is "twenty-eight million, five hundred seventy-five thousand, eight hundred five".