9998945712 has 240 divisors, whose sum is σ = 33119404032. Its totient is φ = 2756436480.

The previous prime is 9998945711. The next prime is 9998945717. The reversal of 9998945712 is 2175498999.

9998945712 is a `hidden beast` number, since 9 + 99 + 89 + 457 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 9998945712.

It is not an unprimeable number, because it can be changed into a prime (9998945711) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4735537 + ... + 4737647.

Almost surely, 2^9998945712 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 9998945712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16559702016).

9998945712 is an abundant number, since it is smaller than the sum of its proper divisors (23120458320).

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

9998945712 is a wasteful number, since it uses less digits than its factorization.

9998945712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2296 (or 2287 counting only the distinct ones).

The product of its digits is 14696640, while the sum is 63.

The square root of 9998945712 is about 99994.7284210523. The cubic root of 9998945712 is about 2154.3589742163.

The spelling of 9998945712 in words is "nine billion, nine hundred ninety-eight million, nine hundred forty-five thousand, seven hundred twelve".