985813188 has 12 divisors (see below), whose sum is σ = 2300230800. Its totient is φ = 328604392.

The previous prime is 985813181. The next prime is 985813247. The reversal of 985813188 is 881318589.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 985813188.

It is not an unprimeable number, because it can be changed into a prime (985813181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41075538 + ... + 41075561.

It is an arithmetic number, because the mean of its divisors is an integer number (191685900).

Almost surely, 2^985813188 is an apocalyptic number.

It is an amenable number.

985813188 is an abundant number, since it is smaller than the sum of its proper divisors (1314417612).

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

985813188 is a wasteful number, since it uses less digits than its factorization.

985813188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82151106 (or 82151104 counting only the distinct ones).

The product of its digits is 552960, while the sum is 51.

The square root of 985813188 is about 31397.6621422679. The cubic root of 985813188 is about 995.2485218797.

The spelling of 985813188 in words is "nine hundred eighty-five million, eight hundred thirteen thousand, one hundred eighty-eight".