31339994880 has 144 divisors (see below), whose sum is σ = 100693522944. Its totient is φ = 8307118080.

The previous prime is 31339994867. The next prime is 31339994947. The reversal of 31339994880 is 8849993313.

It is a self number, because there is not a number n which added to its sum of digits gives 31339994880.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 616845 + ... + 665715.

It is an arithmetic number, because the mean of its divisors is an integer number (699260576).

Almost surely, 2^31339994880 is an apocalyptic number.

31339994880 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31339994880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50346761472).

31339994880 is an abundant number, since it is smaller than the sum of its proper divisors (69353528064).

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

31339994880 is a wasteful number, since it uses less digits than its factorization.

31339994880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49062 (or 49048 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 57.

The spelling of 31339994880 in words is "thirty-one billion, three hundred thirty-nine million, nine hundred ninety-four thousand, eight hundred eighty".