85128188 has 12 divisors (see below), whose sum is σ = 150860640. Its totient is φ = 42025152.

The previous prime is 85128179. The next prime is 85128191. The reversal of 85128188 is 88182158.

It is a congruent number.

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, 134381 + ... + 135012.

It is an arithmetic number, because the mean of its divisors is an integer number (12571720).

Almost surely, 2^85128188 is an apocalyptic number.

It is an amenable number.

85128188 is a deficient number, since it is larger than the sum of its proper divisors (65732452).

85128188 is a wasteful number, since it uses less digits than its factorization.

85128188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269476 (or 269474 counting only the distinct ones).

The product of its digits is 40960, while the sum is 41.

The square root of 85128188 is about 9226.4938085927. The cubic root of 85128188 is about 439.9038839641.

The spelling of 85128188 in words is "eighty-five million, one hundred twenty-eight thousand, one hundred eighty-eight".