998218842 has 8 divisors (see below), whose sum is σ = 1996437696. Its totient is φ = 332739612.

The previous prime is 998218829. The next prime is 998218849. The reversal of 998218842 is 248812899.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

998218842 is an admirable number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (998218849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83184898 + ... + 83184909.

It is an arithmetic number, because the mean of its divisors is an integer number (249554712).

Almost surely, 2^998218842 is an apocalyptic number.

998218842 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

998218842 is a wasteful number, since it uses less digits than its factorization.

998218842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166369812.

The product of its digits is 663552, while the sum is 51.

The square root of 998218842 is about 31594.6014692384. The cubic root of 998218842 is about 999.4059278148.

The spelling of 998218842 in words is "nine hundred ninety-eight million, two hundred eighteen thousand, eight hundred forty-two".