31338981960 has 128 divisors (see below), whose sum is σ = 110453535360. Its totient is φ = 7012915200.

The previous prime is 31338981937. The next prime is 31338981967. The reversal of 31338981960 is 6918983313.

It is not an unprimeable number, because it can be changed into a prime (31338981967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 895981 + ... + 930300.

It is an arithmetic number, because the mean of its divisors is an integer number (862918245).

Almost surely, 2^31338981960 is an apocalyptic number.

31338981960 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31338981960 is an abundant number, since it is smaller than the sum of its proper divisors (79114553400).

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

31338981960 is a wasteful number, since it uses less digits than its factorization.

31338981960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1826319 (or 1826315 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 51.

The spelling of 31338981960 in words is "thirty-one billion, three hundred thirty-eight million, nine hundred eighty-one thousand, nine hundred sixty".