28957585 has 4 divisors (see below), whose sum is σ = 34749108. Its totient is φ = 23166064.

The previous prime is 28957561. The next prime is 28957637. The reversal of 28957585 is 58575982.

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 15737089 + 13220496 = 3967^2 + 3636^2 .

It is a cyclic number.

It is not a de Polignac number, because 28957585 - 2⁹ = 28957073 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2895754 + ... + 2895763.

It is an arithmetic number, because the mean of its divisors is an integer number (8687277).

Almost surely, 2^28957585 is an apocalyptic number.

It is an amenable number.

28957585 is a deficient number, since it is larger than the sum of its proper divisors (5791523).

28957585 is an equidigital number, since it uses as much as digits as its factorization.

28957585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5791522.

The product of its digits is 1008000, while the sum is 49.

The square root of 28957585 is about 5381.2252322310. The cubic root of 28957585 is about 307.0818252113.

The spelling of 28957585 in words is "twenty-eight million, nine hundred fifty-seven thousand, five hundred eighty-five".