85680018 has 40 divisors (see below), whose sum is σ = 193197312. Its totient is φ = 28380024.

The previous prime is 85680011. The next prime is 85680019. The reversal of 85680018 is 81008658.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85680011) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 25471 + ... + 28637.

Almost surely, 2^85680018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85680018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96598656).

85680018 is an abundant number, since it is smaller than the sum of its proper divisors (107517294).

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

85680018 is a wasteful number, since it uses less digits than its factorization.

85680018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3348 (or 3339 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The square root of 85680018 is about 9256.3501446304. The cubic root of 85680018 is about 440.8523731884.

The spelling of 85680018 in words is "eighty-five million, six hundred eighty thousand, eighteen".