998489018 has 16 divisors (see below), whose sum is σ = 1576691136. Its totient is φ = 473309760.

The previous prime is 998488927. The next prime is 998489077. The reversal of 998489018 is 810984899.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90848 + ... + 101243.

It is an arithmetic number, because the mean of its divisors is an integer number (98543196).

Almost surely, 2^998489018 is an apocalyptic number.

998489018 is a deficient number, since it is larger than the sum of its proper divisors (578202118).

998489018 is a wasteful number, since it uses less digits than its factorization.

998489018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192229.

The product of its (nonzero) digits is 1492992, while the sum is 56.

The square root of 998489018 is about 31598.8768471286. The cubic root of 998489018 is about 999.4960854461.

The spelling of 998489018 in words is "nine hundred ninety-eight million, four hundred eighty-nine thousand, eighteen".