85840520 has 32 divisors (see below), whose sum is σ = 193406400. Its totient is φ = 34289088.

The previous prime is 85840487. The next prime is 85840523. The reversal of 85840520 is 2504858.

It is not an unprimeable number, because it can be changed into a prime (85840523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51947 + ... + 53573.

It is an arithmetic number, because the mean of its divisors is an integer number (6043950).

Almost surely, 2^85840520 is an apocalyptic number.

It is an amenable number.

85840520 is an abundant number, since it is smaller than the sum of its proper divisors (107565880).

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

85840520 is a wasteful number, since it uses less digits than its factorization.

85840520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2957 (or 2953 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 85840520 is about 9265.0159201158. The cubic root of 85840520 is about 441.1274803152.

The spelling of 85840520 in words is "eighty-five million, eight hundred forty thousand, five hundred twenty".