31189272938 has 16 divisors (see below), whose sum is σ = 49594991040. Its totient is φ = 14659797696.

The previous prime is 31189272929. The next prime is 31189272967. The reversal of 31189272938 is 83927298113.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31189272938.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 518156 + ... + 575207.

It is an arithmetic number, because the mean of its divisors is an integer number (3099686940).

Almost surely, 2^31189272938 is an apocalyptic number.

31189272938 is a deficient number, since it is larger than the sum of its proper divisors (18405718102).

31189272938 is a wasteful number, since it uses less digits than its factorization.

31189272938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094221.

The product of its digits is 1306368, while the sum is 53.

The spelling of 31189272938 in words is "thirty-one billion, one hundred eighty-nine million, two hundred seventy-two thousand, nine hundred thirty-eight".