28502585 has 16 divisors (see below), whose sum is σ = 35238672. Its totient is φ = 22118400.

The previous prime is 28502581. The next prime is 28502597. The reversal of 28502585 is 58520582.

It can be written as a sum of positive squares in 8 ways, for example, as 157609 + 28344976 = 397^2 + 5324^2 .

It is not a de Polignac number, because 28502585 - 2² = 28502581 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28502581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52415 + ... + 52955.

It is an arithmetic number, because the mean of its divisors is an integer number (2202417).

Almost surely, 2^28502585 is an apocalyptic number.

It is an amenable number.

28502585 is a deficient number, since it is larger than the sum of its proper divisors (6736087).

28502585 is a wasteful number, since it uses less digits than its factorization.

28502585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844.

The product of its (nonzero) digits is 32000, while the sum is 35.

The square root of 28502585 is about 5338.7812279583. The cubic root of 28502585 is about 305.4649720590.

The spelling of 28502585 in words is "twenty-eight million, five hundred two thousand, five hundred eighty-five".