85857500 has 60 divisors (see below), whose sum is σ = 191170056. Its totient is φ = 33720000.

The previous prime is 85857481. The next prime is 85857511. The reversal of 85857500 is 575858.

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 19 ways as a sum of consecutive naturals, for example, 152219 + ... + 152781.

Almost surely, 2^85857500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85857500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95585028).

85857500 is an abundant number, since it is smaller than the sum of its proper divisors (105312556).

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

85857500 is a wasteful number, since it uses less digits than its factorization.

85857500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648 (or 631 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 38.

The square root of 85857500 is about 9265.9322250921. The cubic root of 85857500 is about 441.1565646792.

The spelling of 85857500 in words is "eighty-five million, eight hundred fifty-seven thousand, five hundred".