31728068380 has 48 divisors (see below), whose sum is σ = 67294573920. Its totient is φ = 12564937728.

The previous prime is 31728068377. The next prime is 31728068417. The reversal of 31728068380 is 8386082713.

It is a self number, because there is not a number n which added to its sum of digits gives 31728068380.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1023184 + ... + 1053736.

It is an arithmetic number, because the mean of its divisors is an integer number (1401970290).

Almost surely, 2^31728068380 is an apocalyptic number.

It is an amenable number.

31728068380 is an abundant number, since it is smaller than the sum of its proper divisors (35566505540).

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

31728068380 is a wasteful number, since it uses less digits than its factorization.

31728068380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31078 (or 31076 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 31728068380 in words is "thirty-one billion, seven hundred twenty-eight million, sixty-eight thousand, three hundred eighty".