85857860 has 24 divisors (see below), whose sum is σ = 196693056. Its totient is φ = 31220960.

The previous prime is 85857859. The next prime is 85857869. The reversal of 85857860 is 6875858.

It is not an unprimeable number, because it can be changed into a prime (85857869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194912 + ... + 195351.

It is an arithmetic number, because the mean of its divisors is an integer number (8195544).

Almost surely, 2^85857860 is an apocalyptic number.

It is an amenable number.

85857860 is an abundant number, since it is smaller than the sum of its proper divisors (110835196).

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

85857860 is a wasteful number, since it uses less digits than its factorization.

85857860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390283 (or 390281 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 47.

The square root of 85857860 is about 9265.9516510718. The cubic root of 85857860 is about 441.1571812673.

The spelling of 85857860 in words is "eighty-five million, eight hundred fifty-seven thousand, eight hundred sixty".