31880209439988 has 144 divisors (see below), whose sum is σ = 99185930363520. Its totient is φ = 8407708215552.

The previous prime is 31880209439951. The next prime is 31880209440077. The reversal of 31880209439988 is 88993490208813.

31880209439988 is a `hidden beast` number, since 3 + 1 + 8 + 80 + 20 + 9 + 439 + 98 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 121142806 + ... + 121405682.

It is an arithmetic number, because the mean of its divisors is an integer number (688791183080).

Almost surely, 2^{31880209439988} is an apocalyptic number.

It is an amenable number.

31880209439988 is an abundant number, since it is smaller than the sum of its proper divisors (67305720923532).

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

31880209439988 is a wasteful number, since it uses less digits than its factorization.

31880209439988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299926 (or 299921 counting only the distinct ones).

The product of its (nonzero) digits is 214990848, while the sum is 72.

The spelling of 31880209439988 in words is "thirty-one trillion, eight hundred eighty billion, two hundred nine million, four hundred thirty-nine thousand, nine hundred eighty-eight".