1998045852 has 144 divisors (see below), whose sum is σ = 5538556800. Its totient is φ = 554428800.

The previous prime is 1998045827. The next prime is 1998045913. The reversal of 1998045852 is 2585408991.

It is a junction number, because it is equal to n+sod(n) for n = 1998045795 and 1998045804.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2409774 + ... + 2410602.

It is an arithmetic number, because the mean of its divisors is an integer number (38462200).

Almost surely, 2^1998045852 is an apocalyptic number.

1998045852 is a gapful number since it is divisible by the number (12) 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 1998045852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2769278400).

1998045852 is an abundant number, since it is smaller than the sum of its proper divisors (3540510948).

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

1998045852 is a wasteful number, since it uses less digits than its factorization.

1998045852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928 (or 895 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 51.

The square root of 1998045852 is about 44699.5061717688. The cubic root of 1998045852 is about 1259.5105708097.

The spelling of 1998045852 in words is "one billion, nine hundred ninety-eight million, forty-five thousand, eight hundred fifty-two".