998781073024 has 192 divisors, whose sum is σ = 2479118241600. Its totient is φ = 391531069440.

The previous prime is 998781073001. The next prime is 998781073027. The reversal of 998781073024 is 420370187899.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a self number, because there is not a number n which added to its sum of digits gives 998781073024.

It is not an unprimeable number, because it can be changed into a prime (998781073027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14282304 + ... + 14352064.

It is an arithmetic number, because the mean of its divisors is an integer number (12912074175).

Almost surely, 2^998781073024 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 998781073024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1239559120800).

998781073024 is an abundant number, since it is smaller than the sum of its proper divisors (1480337168576).

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

998781073024 is a wasteful number, since it uses less digits than its factorization.

998781073024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69859 (or 69818 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 58.

The spelling of 998781073024 in words is "nine hundred ninety-eight billion, seven hundred eighty-one million, seventy-three thousand, twenty-four".