28845785 has 8 divisors (see below), whose sum is σ = 34645320. Its totient is φ = 23056384.

The previous prime is 28845769. The next prime is 28845793. The reversal of 28845785 is 58754882.

It can be written as a sum of positive squares in 4 ways, for example, as 1607824 + 27237961 = 1268^2 + 5219^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28845785 - 2⁴ = 28845769 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7001 + ... + 10329.

It is an arithmetic number, because the mean of its divisors is an integer number (4330665).

Almost surely, 2^28845785 is an apocalyptic number.

It is an amenable number.

28845785 is a deficient number, since it is larger than the sum of its proper divisors (5799535).

28845785 is a wasteful number, since it uses less digits than its factorization.

28845785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5067.

The product of its digits is 716800, while the sum is 47.

The square root of 28845785 is about 5370.8272174778. The cubic root of 28845785 is about 306.6861197227.

The spelling of 28845785 in words is "twenty-eight million, eight hundred forty-five thousand, seven hundred eighty-five".