28085845 has 8 divisors (see below), whose sum is σ = 34790400. Its totient is φ = 21743760.

The previous prime is 28085839. The next prime is 28085851. The reversal of 28085845 is 54858082.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28085839) and next prime (28085851).

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

It is not a de Polignac number, because 28085845 - 2⁹ = 28085333 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28085798 and 28085807.

It is a congruent number.

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, 90445 + ... + 90754.

It is an arithmetic number, because the mean of its divisors is an integer number (4348800).

Almost surely, 2^28085845 is an apocalyptic number.

It is an amenable number.

28085845 is a deficient number, since it is larger than the sum of its proper divisors (6704555).

28085845 is a wasteful number, since it uses less digits than its factorization.

28085845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181235.

The product of its (nonzero) digits is 102400, while the sum is 40.

The square root of 28085845 is about 5299.6080043716. The cubic root of 28085845 is about 303.9689091299.

The spelling of 28085845 in words is "twenty-eight million, eighty-five thousand, eight hundred forty-five".