9998032520 has 192 divisors, whose sum is σ = 27870428160. Its totient is φ = 3207321600.

The previous prime is 9998032397. The next prime is 9998032543. The reversal of 9998032520 is 252308999.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6363335 + ... + 6364905.

It is an arithmetic number, because the mean of its divisors is an integer number (145158480).

Almost surely, 2^9998032520 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 9998032520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13935214080).

9998032520 is an abundant number, since it is smaller than the sum of its proper divisors (17872395640).

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

9998032520 is a wasteful number, since it uses less digits than its factorization.

9998032520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804 (or 1793 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 9998032520 is about 99990.1621160802. The cubic root of 9998032520 is about 2154.2933871923.

The spelling of 9998032520 in words is "nine billion, nine hundred ninety-eight million, thirty-two thousand, five hundred twenty".