85000520 has 32 divisors (see below), whose sum is σ = 208638720. Its totient is φ = 30909120.

The previous prime is 85000483. The next prime is 85000541. The reversal of 85000520 is 2500058.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 85000492 and 85000501.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96152 + ... + 97031.

It is an arithmetic number, because the mean of its divisors is an integer number (6519960).

Almost surely, 2^85000520 is an apocalyptic number.

It is an amenable number.

85000520 is an abundant number, since it is smaller than the sum of its proper divisors (123638200).

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

85000520 is a wasteful number, since it uses less digits than its factorization.

85000520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193205 (or 193201 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 85000520 is about 9219.5726582093. The cubic root of 85000520 is about 439.6838638224.

Adding to 85000520 its reverse (2500058), we get a palindrome (87500578).

The spelling of 85000520 in words is "eighty-five million, five hundred twenty", and thus it is an aban number.