9998725212 has 240 divisors, whose sum is σ = 31070128320. Its totient is φ = 2743372800.

The previous prime is 9998725207. The next prime is 9998725267. The reversal of 9998725212 is 2125278999.

9998725212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 18481662 + ... + 18482202.

It is an arithmetic number, because the mean of its divisors is an integer number (129458868).

Almost surely, 2^9998725212 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 9998725212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15535064160).

9998725212 is an abundant number, since it is smaller than the sum of its proper divisors (21071403108).

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

9998725212 is a wasteful number, since it uses less digits than its factorization.

9998725212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874 (or 863 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 54.

The square root of 9998725212 is about 99993.6258568515. The cubic root of 9998725212 is about 2154.3431378918.

The spelling of 9998725212 in words is "nine billion, nine hundred ninety-eight million, seven hundred twenty-five thousand, two hundred twelve".