31389057882 has 288 divisors, whose sum is σ = 90378288000. Its totient is φ = 7782034176.

The previous prime is 31389057871. The next prime is 31389057937. The reversal of 31389057882 is 28875098313.

31389057882 is a `hidden beast` number, since 31 + 38 + 9 + 0 + 578 + 8 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 32459763 + ... + 32460729.

It is an arithmetic number, because the mean of its divisors is an integer number (313813500).

Almost surely, 2^31389057882 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31389057882, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45189144000).

31389057882 is an abundant number, since it is smaller than the sum of its proper divisors (58989230118).

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

31389057882 is a wasteful number, since it uses less digits than its factorization.

31389057882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170 (or 1160 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 31389057882 in words is "thirty-one billion, three hundred eighty-nine million, fifty-seven thousand, eight hundred eighty-two".