28572085 has 4 divisors (see below), whose sum is σ = 34286508. Its totient is φ = 22857664.

The previous prime is 28572077. The next prime is 28572109. The reversal of 28572085 is 58027582.

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 11737476 + 16834609 = 3426^2 + 4103^2 .

It is a cyclic number.

It is not a de Polignac number, because 28572085 - 2³ = 28572077 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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2857204 + ... + 2857213.

It is an arithmetic number, because the mean of its divisors is an integer number (8571627).

Almost surely, 2^28572085 is an apocalyptic number.

It is an amenable number.

28572085 is a deficient number, since it is larger than the sum of its proper divisors (5714423).

28572085 is an equidigital number, since it uses as much as digits as its factorization.

28572085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5714422.

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 28572085 is about 5345.2862411661. The cubic root of 28572085 is about 305.7130499495.

The spelling of 28572085 in words is "twenty-eight million, five hundred seventy-two thousand, eighty-five".