31438771338 has 16 divisors (see below), whose sum is σ = 67714276896. Its totient is φ = 9673468080.

The previous prime is 31438771333. The next prime is 31438771339. The reversal of 31438771338 is 83317783413.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31438771333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201530508 + ... + 201530663.

It is an arithmetic number, because the mean of its divisors is an integer number (4232142306).

Almost surely, 2^31438771338 is an apocalyptic number.

31438771338 is an abundant number, since it is smaller than the sum of its proper divisors (36275505558).

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

31438771338 is a wasteful number, since it uses less digits than its factorization.

31438771338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403061189.

The product of its digits is 1016064, while the sum is 48.

The spelling of 31438771338 in words is "thirty-one billion, four hundred thirty-eight million, seven hundred seventy-one thousand, three hundred thirty-eight".