1998168 has 16 divisors (see below), whose sum is σ = 4995480. Its totient is φ = 666048.

The previous prime is 1998133. The next prime is 1998169. The reversal of 1998168 is 8618991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41605 + ... + 41652.

2^1998168 is an apocalyptic number.

It is an amenable number.

1998168 is an abundant number, since it is smaller than the sum of its proper divisors (2997312).

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

1998168 is a wasteful number, since it uses less digits than its factorization.

1998168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83266 (or 83262 counting only the distinct ones).

The product of its digits is 31104, while the sum is 42.

The square root of 1998168 is about 1413.5657041680. The cubic root of 1998168 is about 125.9536236481.

The spelling of 1998168 in words is "one million, nine hundred ninety-eight thousand, one hundred sixty-eight".