28785085 has 8 divisors (see below), whose sum is σ = 39476736. Its totient is φ = 19738320.

The previous prime is 28785083. The next prime is 28785091. The reversal of 28785085 is 58058782.

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

It is not a de Polignac number, because 28785085 - 2¹ = 28785083 is a prime.

It is a super-3 number, since 3×28785085³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28785083) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 411181 + ... + 411250.

It is an arithmetic number, because the mean of its divisors is an integer number (4934592).

Almost surely, 2^28785085 is an apocalyptic number.

It is an amenable number.

28785085 is a deficient number, since it is larger than the sum of its proper divisors (10691651).

28785085 is an equidigital number, since it uses as much as digits as its factorization.

28785085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822443.

The product of its (nonzero) digits is 179200, while the sum is 43.

The square root of 28785085 is about 5365.1733429592. The cubic root of 28785085 is about 306.4708494445.

The spelling of 28785085 in words is "twenty-eight million, seven hundred eighty-five thousand, eighty-five".