1998801 has 12 divisors (see below), whose sum is σ = 3299712. Its totient is φ = 1142136.

The previous prime is 1998793. The next prime is 1998817. The reversal of 1998801 is 1088991.

It is not a de Polignac number, because 1998801 - 2³ = 1998793 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15801 + ... + 15926.

It is an arithmetic number, because the mean of its divisors is an integer number (274976).

2^1998801 is an apocalyptic number.

It is an amenable number.

1998801 is a deficient number, since it is larger than the sum of its proper divisors (1300911).

1998801 is a wasteful number, since it uses less digits than its factorization.

1998801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31740 (or 31737 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 1998801 is about 1413.7895883051. The cubic root of 1998801 is about 125.9669225342.

The spelling of 1998801 in words is "one million, nine hundred ninety-eight thousand, eight hundred one".