985998 has 16 divisors (see below), whose sum is σ = 2123856. Its totient is φ = 303360.

The previous prime is 985997. The next prime is 986023. The reversal of 985998 is 899589.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 985998.

It is not an unprimeable number, because it can be changed into a prime (985991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6243 + ... + 6398.

It is an arithmetic number, because the mean of its divisors is an integer number (132741).

2⁹⁸⁵⁹⁹⁸ is an apocalyptic number.

985998 is an abundant number, since it is smaller than the sum of its proper divisors (1137858).

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

985998 is a wasteful number, since it uses less digits than its factorization.

985998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12659.

The product of its digits is 233280, while the sum is 48.

The square root of 985998 is about 992.9743199096. The cubic root of 985998 is about 99.5310711613.

The spelling of 985998 in words is "nine hundred eighty-five thousand, nine hundred ninety-eight".