85315728 has 20 divisors (see below), whose sum is σ = 220399088. Its totient is φ = 28438560.

The previous prime is 85315721. The next prime is 85315733. The reversal of 85315728 is 82751358.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (85315721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 888658 + ... + 888753.

Almost surely, 2^85315728 is an apocalyptic number.

It is an amenable number.

85315728 is an abundant number, since it is smaller than the sum of its proper divisors (135083360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85315728 is a wasteful number, since it uses less digits than its factorization.

85315728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1777422 (or 1777416 counting only the distinct ones).

The product of its digits is 67200, while the sum is 39.

The square root of 85315728 is about 9236.6513412600. The cubic root of 85315728 is about 440.2266875984.

The spelling of 85315728 in words is "eighty-five million, three hundred fifteen thousand, seven hundred twenty-eight".