1998914281728 has 288 divisors, whose sum is σ = 6551773761792. Its totient is φ = 526860288000.

The previous prime is 1998914281703. The next prime is 1998914281817. The reversal of 1998914281728 is 8271824198991.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125860348 + ... + 125876228.

Almost surely, 2^{1998914281728} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1998914281728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3275886880896).

1998914281728 is an abundant number, since it is smaller than the sum of its proper divisors (4552859480064).

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

1998914281728 is a wasteful number, since it uses less digits than its factorization.

1998914281728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17721 (or 17707 counting only the distinct ones).

The product of its digits is 41803776, while the sum is 69.

The spelling of 1998914281728 in words is "one trillion, nine hundred ninety-eight billion, nine hundred fourteen million, two hundred eighty-one thousand, seven hundred twenty-eight".