8538320138 has 32 divisors (see below), whose sum is σ = 13127400000. Its totient is φ = 4163981184.

The previous prime is 8538320129. The next prime is 8538320179. The reversal of 8538320138 is 8310238358.

It is a junction number, because it is equal to n+sod(n) for n = 8538320095 and 8538320104.

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 15 ways as a sum of consecutive naturals, for example, 9962606 + ... + 9963462.

It is an arithmetic number, because the mean of its divisors is an integer number (410231250).

Almost surely, 2^8538320138 is an apocalyptic number.

8538320138 is a deficient number, since it is larger than the sum of its proper divisors (4589079862).

8538320138 is a wasteful number, since it uses less digits than its factorization.

8538320138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1574.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 8538320138 is about 92403.0310000706. The cubic root of 8538320138 is about 2043.8898083923.

The spelling of 8538320138 in words is "eight billion, five hundred thirty-eight million, three hundred twenty thousand, one hundred thirty-eight".