85866188 has 12 divisors (see below), whose sum is σ = 150334800. Its totient is φ = 42913392.

The previous prime is 85866173. The next prime is 85866197. The reversal of 85866188 is 88166858.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9713 + ... + 16311.

It is an arithmetic number, because the mean of its divisors is an integer number (12527900).

Almost surely, 2^85866188 is an apocalyptic number.

It is an amenable number.

85866188 is a deficient number, since it is larger than the sum of its proper divisors (64468612).

85866188 is a wasteful number, since it uses less digits than its factorization.

85866188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9856 (or 9854 counting only the distinct ones).

The product of its digits is 737280, while the sum is 50.

The square root of 85866188 is about 9266.4010273676. The cubic root of 85866188 is about 441.1714445245.

The spelling of 85866188 in words is "eighty-five million, eight hundred sixty-six thousand, one hundred eighty-eight".