8721387030 has 128 divisors (see below), whose sum is σ = 22409809920. Its totient is φ = 2165961600.

The previous prime is 8721387023. The next prime is 8721387047. The reversal of 8721387030 is 307831278.

8721387030 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 8721387030.

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 63 ways as a sum of consecutive naturals, for example, 9209017 + ... + 9209963.

It is an arithmetic number, because the mean of its divisors is an integer number (175076640).

Almost surely, 2^8721387030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8721387030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11204904960).

8721387030 is an abundant number, since it is smaller than the sum of its proper divisors (13688422890).

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

8721387030 is a wasteful number, since it uses less digits than its factorization.

8721387030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 8721387030 is about 93388.3666737994. The cubic root of 8721387030 is about 2058.3940597330.

The spelling of 8721387030 in words is "eight billion, seven hundred twenty-one million, three hundred eighty-seven thousand, thirty".