9986045784 has 256 divisors, whose sum is σ = 29956953600. Its totient is φ = 2757173760.

The previous prime is 9986045749. The next prime is 9986045851. The reversal of 9986045784 is 4875406899.

It is a super-2 number, since 2×9986045784² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 57722722 + ... + 57722894.

It is an arithmetic number, because the mean of its divisors is an integer number (117019350).

Almost surely, 2^9986045784 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 9986045784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14978476800).

9986045784 is an abundant number, since it is smaller than the sum of its proper divisors (19970907816).

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

9986045784 is a wasteful number, since it uses less digits than its factorization.

9986045784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 60.

The square root of 9986045784 is about 99930.2045629849. The cubic root of 9986045784 is about 2153.4321086452.

The spelling of 9986045784 in words is "nine billion, nine hundred eighty-six million, forty-five thousand, seven hundred eighty-four".