985287980 has 24 divisors (see below), whose sum is σ = 2080543920. Its totient is φ = 391936320.

The previous prime is 985287977. The next prime is 985287991. The reversal of 985287980 is 89782589.

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, 132470 + ... + 139709.

It is an arithmetic number, because the mean of its divisors is an integer number (86689330).

Almost surely, 2^985287980 is an apocalyptic number.

It is an amenable number.

985287980 is an abundant number, since it is smaller than the sum of its proper divisors (1095255940).

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

985287980 is a wasteful number, since it uses less digits than its factorization.

985287980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272369 (or 272367 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 56.

The square root of 985287980 is about 31389.2972205496. The cubic root of 985287980 is about 995.0717455400.

The spelling of 985287980 in words is "nine hundred eighty-five million, two hundred eighty-seven thousand, nine hundred eighty".