8731731138 has 16 divisors (see below), whose sum is σ = 18806805696. Its totient is φ = 2686686480.

The previous prime is 8731731119. The next prime is 8731731139. The reversal of 8731731138 is 8311371378.

It is a self number, because there is not a number n which added to its sum of digits gives 8731731138.

It is not an unprimeable number, because it can be changed into a prime (8731731139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55972558 + ... + 55972713.

It is an arithmetic number, because the mean of its divisors is an integer number (1175425356).

Almost surely, 2^8731731138 is an apocalyptic number.

8731731138 is an abundant number, since it is smaller than the sum of its proper divisors (10075074558).

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

8731731138 is a wasteful number, since it uses less digits than its factorization.

8731731138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111945289.

The product of its digits is 84672, while the sum is 42.

The square root of 8731731138 is about 93443.7324704017. The cubic root of 8731731138 is about 2059.2075327105.

The spelling of 8731731138 in words is "eight billion, seven hundred thirty-one million, seven hundred thirty-one thousand, one hundred thirty-eight".