28575385 has 8 divisors (see below), whose sum is σ = 36307656. Its totient is φ = 21515520.

The previous prime is 28575377. The next prime is 28575403. The reversal of 28575385 is 58357582.

It can be written as a sum of positive squares in 4 ways, for example, as 1420864 + 27154521 = 1192^2 + 5211^2 .

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

It is not a de Polignac number, because 28575385 - 2³ = 28575377 is a prime.

It is a Duffinian 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, 168006 + ... + 168175.

It is an arithmetic number, because the mean of its divisors is an integer number (4538457).

Almost surely, 2^28575385 is an apocalyptic number.

It is an amenable number.

28575385 is a deficient number, since it is larger than the sum of its proper divisors (7732271).

28575385 is a wasteful number, since it uses less digits than its factorization.

28575385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336203.

The product of its digits is 336000, while the sum is 43.

The square root of 28575385 is about 5345.5949154421. The cubic root of 28575385 is about 305.7248191784.

The spelling of 28575385 in words is "twenty-eight million, five hundred seventy-five thousand, three hundred eighty-five".