985581992 has 16 divisors (see below), whose sum is σ = 1849187040. Its totient is φ = 492465456.

The previous prime is 985581991. The next prime is 985581997. The reversal of 985581992 is 299185589.

It is not an unprimeable number, because it can be changed into a prime (985581991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27578 + ... + 52265.

It is an arithmetic number, because the mean of its divisors is an integer number (115574190).

Almost surely, 2^985581992 is an apocalyptic number.

It is an amenable number.

985581992 is a deficient number, since it is larger than the sum of its proper divisors (863605048).

985581992 is a wasteful number, since it uses less digits than its factorization.

985581992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81392 (or 81388 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 56.

The square root of 985581992 is about 31393.9801872907. The cubic root of 985581992 is about 995.1707128620.

The spelling of 985581992 in words is "nine hundred eighty-five million, five hundred eighty-one thousand, nine hundred ninety-two".