8721386084 has 24 divisors (see below), whose sum is σ = 15342497016. Its totient is φ = 4337856000.

The previous prime is 8721386071. The next prime is 8721386111. The reversal of 8721386084 is 4806831278.

It can be written as a sum of positive squares in 4 ways, for example, as 5399016484 + 3322369600 = 73478^2 + 57640^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 979814 + ... + 988674.

It is an arithmetic number, because the mean of its divisors is an integer number (639270709).

Almost surely, 2^8721386084 is an apocalyptic number.

It is an amenable number.

8721386084 is a deficient number, since it is larger than the sum of its proper divisors (6621110932).

8721386084 is a wasteful number, since it uses less digits than its factorization.

8721386084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10127 (or 10125 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 47.

The square root of 8721386084 is about 93388.3616089286. The cubic root of 8721386084 is about 2058.3939853090.

The spelling of 8721386084 in words is "eight billion, seven hundred twenty-one million, three hundred eighty-six thousand, eighty-four".