85870520 has 16 divisors (see below), whose sum is σ = 193208760. Its totient is φ = 34348192.

The previous prime is 85870517. The next prime is 85870531. The reversal of 85870520 is 2507858.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1073342 + ... + 1073421.

Almost surely, 2^85870520 is an apocalyptic number.

It is an amenable number.

85870520 is an abundant number, since it is smaller than the sum of its proper divisors (107338240).

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

85870520 is a wasteful number, since it uses less digits than its factorization.

85870520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146774 (or 2146770 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 35.

The square root of 85870520 is about 9266.6347721274. The cubic root of 85870520 is about 441.1788635199.

The spelling of 85870520 in words is "eighty-five million, eight hundred seventy thousand, five hundred twenty".