1998132 has 24 divisors (see below), whose sum is σ = 4687200. Its totient is φ = 662496.

The previous prime is 1998127. The next prime is 1998133. The reversal of 1998132 is 2318991.

It is a junction number, because it is equal to n+sod(n) for n = 1998093 and 1998102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998133) 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 7 ways as a sum of consecutive naturals, for example, 2919 + ... + 3537.

It is an arithmetic number, because the mean of its divisors is an integer number (195300).

2^1998132 is an apocalyptic number.

1998132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1998132 is an abundant number, since it is smaller than the sum of its proper divisors (2689068).

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

1998132 is a wasteful number, since it uses less digits than its factorization.

1998132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895 (or 893 counting only the distinct ones).

The product of its digits is 3888, while the sum is 33.

The square root of 1998132 is about 1413.5529703552. The cubic root of 1998132 is about 125.9528672289.

The spelling of 1998132 in words is "one million, nine hundred ninety-eight thousand, one hundred thirty-two".