985209860 has 12 divisors (see below), whose sum is σ = 2068940748. Its totient is φ = 394083936.

The previous prime is 985209847. The next prime is 985209871. The reversal of 985209860 is 68902589.

It can be written as a sum of positive squares in 2 ways, for example, as 149768644 + 835441216 = 12238^2 + 28904^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24630227 + ... + 24630266.

It is an arithmetic number, because the mean of its divisors is an integer number (172411729).

Almost surely, 2^985209860 is an apocalyptic number.

It is an amenable number.

985209860 is an abundant number, since it is smaller than the sum of its proper divisors (1083730888).

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

985209860 is a wasteful number, since it uses less digits than its factorization.

985209860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49260502 (or 49260500 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 985209860 is about 31388.0528226904. The cubic root of 985209860 is about 995.0454462715.

The spelling of 985209860 in words is "nine hundred eighty-five million, two hundred nine thousand, eight hundred sixty".