31857723348 has 48 divisors (see below), whose sum is σ = 81119087616. Its totient is φ = 9650676960.

The previous prime is 31857723323. The next prime is 31857723371. The reversal of 31857723348 is 84332775813.

It is a self number, because there is not a number n which added to its sum of digits gives 31857723348.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 379365 + ... + 455667.

It is an arithmetic number, because the mean of its divisors is an integer number (1689980992).

Almost surely, 2^31857723348 is an apocalyptic number.

It is an amenable number.

31857723348 is an abundant number, since it is smaller than the sum of its proper divisors (49261364268).

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

31857723348 is a wasteful number, since it uses less digits than its factorization.

31857723348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79484 (or 79482 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 51.

The spelling of 31857723348 in words is "thirty-one billion, eight hundred fifty-seven million, seven hundred twenty-three thousand, three hundred forty-eight".