985771608 has 64 divisors (see below), whose sum is σ = 2532418560. Its totient is φ = 319612416.

The previous prime is 985771607. The next prime is 985771637. The reversal of 985771608 is 806177589.

985771608 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 31397²-1.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985771601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185760 + ... + 190992.

It is an arithmetic number, because the mean of its divisors is an integer number (39569040).

Almost surely, 2^985771608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 985771608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1266209280).

985771608 is an abundant number, since it is smaller than the sum of its proper divisors (1546646952).

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

985771608 is a wasteful number, since it uses less digits than its factorization.

985771608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5456 (or 5452 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 51.

The square root of 985771608 is about 31396.9999840749. Note that the first 4 decimals coincide. The cubic root of 985771608 is about 995.2345290272.

The spelling of 985771608 in words is "nine hundred eighty-five million, seven hundred seventy-one thousand, six hundred eight".