28585873 has 4 divisors (see below), whose sum is σ = 28743988. Its totient is φ = 28427760.

The previous prime is 28585871. The next prime is 28585901. The reversal of 28585873 is 37858582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14500864 + 14085009 = 3808^2 + 3753^2 .

It is a cyclic number.

It is not a de Polignac number, because 28585873 - 2¹ = 28585871 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28585871) 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 3 ways as a sum of consecutive naturals, for example, 78786 + ... + 79147.

It is an arithmetic number, because the mean of its divisors is an integer number (7185997).

Almost surely, 2^28585873 is an apocalyptic number.

It is an amenable number.

28585873 is a deficient number, since it is larger than the sum of its proper divisors (158115).

28585873 is a wasteful number, since it uses less digits than its factorization.

28585873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158114.

The product of its digits is 537600, while the sum is 46.

The square root of 28585873 is about 5346.5758200927. The cubic root of 28585873 is about 305.7622179127.

The spelling of 28585873 in words is "twenty-eight million, five hundred eighty-five thousand, eight hundred seventy-three".