998981289328 has 80 divisors (see below), whose sum is σ = 2160313731072. Its totient is φ = 443679840000.

The previous prime is 998981289283. The next prime is 998981289377. The reversal of 998981289328 is 823982189899.

It is a super-3 number, since 3×998981289328³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1313025 + ... + 1929247.

Almost surely, 2^998981289328 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 998981289328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1080156865536).

998981289328 is an abundant number, since it is smaller than the sum of its proper divisors (1161332441744).

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

998981289328 is a wasteful number, since it uses less digits than its factorization.

998981289328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616454 (or 616448 counting only the distinct ones).

The product of its digits is 322486272, while the sum is 76.

The spelling of 998981289328 in words is "nine hundred ninety-eight billion, nine hundred eighty-one million, two hundred eighty-nine thousand, three hundred twenty-eight".