1998866112 has 112 divisors (see below), whose sum is σ = 5593104384. Its totient is φ = 628992000.

The previous prime is 1998866057. The next prime is 1998866113. The reversal of 1998866112 is 2116688991.

It is not an unprimeable number, because it can be changed into a prime (1998866113) 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 15 ways as a sum of consecutive naturals, for example, 239937 + ... + 248127.

It is an arithmetic number, because the mean of its divisors is an integer number (49938432).

Almost surely, 2^1998866112 is an apocalyptic number.

1998866112 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 1998866112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2796552192).

1998866112 is an abundant number, since it is smaller than the sum of its proper divisors (3594238272).

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

1998866112 is a wasteful number, since it uses less digits than its factorization.

1998866112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8278 (or 8268 counting only the distinct ones).

The product of its digits is 373248, while the sum is 51.

The square root of 1998866112 is about 44708.6804994287. The cubic root of 1998866112 is about 1259.6829033240.

The spelling of 1998866112 in words is "one billion, nine hundred ninety-eight million, eight hundred sixty-six thousand, one hundred twelve".