1998336 has 40 divisors (see below), whose sum is σ = 5327784. Its totient is φ = 665600.

The previous prime is 1998331. The next prime is 1998341. The reversal of 1998336 is 6338991.

It is an interprime number because it is at equal distance from previous prime (1998331) and next prime (1998341).

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 1998294 and 1998303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998331) 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, 886 + ... + 2186.

2^1998336 is an apocalyptic number.

1998336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1998336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2663892).

1998336 is an abundant number, since it is smaller than the sum of its proper divisors (3329448).

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

1998336 is an equidigital number, since it uses as much as digits as its factorization.

1998336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322 (or 1306 counting only the distinct ones).

The product of its digits is 34992, while the sum is 39.

The square root of 1998336 is about 1413.6251271111. The cubic root of 1998336 is about 125.9571534840.

The spelling of 1998336 in words is "one million, nine hundred ninety-eight thousand, three hundred thirty-six".