85638988 has 24 divisors (see below), whose sum is σ = 155151360. Its totient is φ = 41318160.

The previous prime is 85638953. The next prime is 85639003. The reversal of 85638988 is 88983658.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54153 + ... + 55711.

It is an arithmetic number, because the mean of its divisors is an integer number (6464640).

Almost surely, 2^85638988 is an apocalyptic number.

It is an amenable number.

85638988 is a deficient number, since it is larger than the sum of its proper divisors (69512372).

85638988 is a wasteful number, since it uses less digits than its factorization.

85638988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2037 (or 2035 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 55.

The square root of 85638988 is about 9254.1335629004. The cubic root of 85638988 is about 440.7819909243.

The spelling of 85638988 in words is "eighty-five million, six hundred thirty-eight thousand, nine hundred eighty-eight".