8387117838 has 32 divisors (see below), whose sum is σ = 20332408320. Its totient is φ = 2541550680.

The previous prime is 8387117737. The next prime is 8387117839.

8387117838 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8387117839) 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, 7059270 + ... + 7060457.

It is an arithmetic number, because the mean of its divisors is an integer number (635387760).

Almost surely, 2^8387117838 is an apocalyptic number.

8387117838 is an abundant number, since it is smaller than the sum of its proper divisors (11945290482).

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

8387117838 is a wasteful number, since it uses less digits than its factorization.

8387117838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14119749 (or 14119743 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 54.

The square root of 8387117838 is about 91581.2089786982. The cubic root of 8387117838 is about 2031.7530246194.

The spelling of 8387117838 in words is "eight billion, three hundred eighty-seven million, one hundred seventeen thousand, eight hundred thirty-eight".