85812520 has 32 divisors (see below), whose sum is σ = 197572320. Its totient is φ = 33526080.

The previous prime is 85812511. The next prime is 85812533. The reversal of 85812520 is 2521858.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23226 + ... + 26665.

It is an arithmetic number, because the mean of its divisors is an integer number (6174135).

Almost surely, 2^85812520 is an apocalyptic number.

It is an amenable number.

85812520 is an abundant number, since it is smaller than the sum of its proper divisors (111759800).

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

85812520 is a wasteful number, since it uses less digits than its factorization.

85812520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49945 (or 49941 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 85812520 is about 9263.5047363295. The cubic root of 85812520 is about 441.0795118552.

The spelling of 85812520 in words is "eighty-five million, eight hundred twelve thousand, five hundred twenty".