31878384008 has 64 divisors (see below), whose sum is σ = 64537067520. Its totient is φ = 14719003200.

The previous prime is 31878384007. The next prime is 31878384019. The reversal of 31878384008 is 80048387813.

It is not an unprimeable number, because it can be changed into a prime (31878384007) 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, 2451941 + ... + 2464907.

It is an arithmetic number, because the mean of its divisors is an integer number (1008391680).

Almost surely, 2^31878384008 is an apocalyptic number.

It is an amenable number.

31878384008 is an abundant number, since it is smaller than the sum of its proper divisors (32658683512).

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

31878384008 is a wasteful number, since it uses less digits than its factorization.

31878384008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13458 (or 13454 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 50.

The spelling of 31878384008 in words is "thirty-one billion, eight hundred seventy-eight million, three hundred eighty-four thousand, eight".