8721696984 has 512 divisors, whose sum is σ = 30965760000. Its totient is φ = 2015193600.

The previous prime is 8721696941. The next prime is 8721697031. The reversal of 8721696984 is 4896961278.

Its product of digits (10450944) is a multiple of the sum of its prime factors (324).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 36492337 + ... + 36492575.

It is an arithmetic number, because the mean of its divisors is an integer number (60480000).

Almost surely, 2^8721696984 is an apocalyptic number.

8721696984 is a gapful number since it is divisible by the number (84) 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 8721696984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15482880000).

8721696984 is an abundant number, since it is smaller than the sum of its proper divisors (22244063016).

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

8721696984 is a wasteful number, since it uses less digits than its factorization.

8721696984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324 (or 306 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 60.

The square root of 8721696984 is about 93390.0261484062. The cubic root of 8721696984 is about 2058.4184442303.

The spelling of 8721696984 in words is "eight billion, seven hundred twenty-one million, six hundred ninety-six thousand, nine hundred eighty-four".