998730472128 has 224 divisors, whose sum is σ = 2751319872000. Its totient is φ = 319484928000.

The previous prime is 998730472097. The next prime is 998730472133. The reversal of 998730472128 is 821274037899.

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, 278895298 + ... + 278898878.

It is an arithmetic number, because the mean of its divisors is an integer number (12282678000).

Almost surely, 2^998730472128 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 998730472128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1375659936000).

998730472128 is an abundant number, since it is smaller than the sum of its proper divisors (1752589399872).

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

998730472128 is a wasteful number, since it uses less digits than its factorization.

998730472128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4207 (or 4197 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 60.

The spelling of 998730472128 in words is "nine hundred ninety-eight billion, seven hundred thirty million, four hundred seventy-two thousand, one hundred twenty-eight".