985387860 has 36 divisors (see below), whose sum is σ = 2989010388. Its totient is φ = 262770048.

The previous prime is 985387849. The next prime is 985387877. The reversal of 985387860 is 68783589.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 628404624 + 356983236 = 25068^2 + 18894^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 985387797 and 985387806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2737009 + ... + 2737368.

Almost surely, 2^985387860 is an apocalyptic number.

985387860 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

985387860 is an abundant number, since it is smaller than the sum of its proper divisors (2003622528).

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

985387860 is a wasteful number, since it uses less digits than its factorization.

985387860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5474392 (or 5474387 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The square root of 985387860 is about 31390.8881683841. Note that the first 3 decimals coincide. The cubic root of 985387860 is about 995.1053683351.

The spelling of 985387860 in words is "nine hundred eighty-five million, three hundred eighty-seven thousand, eight hundred sixty".