85520520 has 96 divisors (see below), whose sum is σ = 292593600. Its totient is φ = 21603456.

The previous prime is 85520503. The next prime is 85520521. The reversal of 85520520 is 2502558.

It is not an unprimeable number, because it can be changed into a prime (85520521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 589 + ... + 13091.

It is an arithmetic number, because the mean of its divisors is an integer number (3047850).

Almost surely, 2^85520520 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 85520520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146296800).

85520520 is an abundant number, since it is smaller than the sum of its proper divisors (207073080).

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

85520520 is a wasteful number, since it uses less digits than its factorization.

85520520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12539 (or 12532 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 85520520 is about 9247.7305324063. The cubic root of 85520520 is about 440.5786463989.

The spelling of 85520520 in words is "eighty-five million, five hundred twenty thousand, five hundred twenty".