8340215538 has 32 divisors (see below), whose sum is σ = 17665750080. Its totient is φ = 2615928320.

The previous prime is 8340215467. The next prime is 8340215539. The reversal of 8340215538 is 8355120438.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8340215496 and 8340215505.

It is not an unprimeable number, because it can be changed into a prime (8340215539) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 658873 + ... + 671411.

It is an arithmetic number, because the mean of its divisors is an integer number (552054690).

Almost surely, 2^8340215538 is an apocalyptic number.

8340215538 is an abundant number, since it is smaller than the sum of its proper divisors (9325534542).

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

8340215538 is a wasteful number, since it uses less digits than its factorization.

8340215538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19082.

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 8340215538 is about 91324.7805253317. The cubic root of 8340215538 is about 2027.9586310707.

The spelling of 8340215538 in words is "eight billion, three hundred forty million, two hundred fifteen thousand, five hundred thirty-eight".