998788320 has 168 divisors, whose sum is σ = 3538250856. Its totient is φ = 266312448.

The previous prime is 998788303. The next prime is 998788327. The reversal of 998788320 is 23887899.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998788327) 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 27 ways as a sum of consecutive naturals, for example, 112359 + ... + 120921.

It is an arithmetic number, because the mean of its divisors is an integer number (21061017).

Almost surely, 2^998788320 is an apocalyptic number.

998788320 is a gapful number since it is divisible by the number (90) 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 998788320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1769125428).

998788320 is an abundant number, since it is smaller than the sum of its proper divisors (2539462536).

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

998788320 is an equidigital number, since it uses as much as digits as its factorization.

998788320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8596 (or 8573 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The square root of 998788320 is about 31603.6124517436. The cubic root of 998788320 is about 999.5959434269.

The spelling of 998788320 in words is "nine hundred ninety-eight million, seven hundred eighty-eight thousand, three hundred twenty".