8387478747838 has 32 divisors (see below), whose sum is σ = 13458637386720. Its totient is φ = 3906384921600.

The previous prime is 8387478747803. The next prime is 8387478747839.

It is a happy number.

8387478747838 is nontrivially palindromic in base 10.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8387478747839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7998453 + ... + 8986111.

It is an arithmetic number, because the mean of its divisors is an integer number (420582418335).

Almost surely, 2^{8387478747838} is an apocalyptic number.

8387478747838 is a deficient number, since it is larger than the sum of its proper divisors (5071158638882).

8387478747838 is a wasteful number, since it uses less digits than its factorization.

8387478747838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990252.

The product of its digits is 11329339392, while the sum is 82.

The spelling of 8387478747838 in words is "eight trillion, three hundred eighty-seven billion, four hundred seventy-eight million, seven hundred forty-seven thousand, eight hundred thirty-eight".