31399941328 has 20 divisors (see below), whose sum is σ = 69528441760. Its totient is φ = 13457117664.

The previous prime is 31399941317. The next prime is 31399941361. The reversal of 31399941328 is 82314999313.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140178198 + ... + 140178421.

It is an arithmetic number, because the mean of its divisors is an integer number (3476422088).

Almost surely, 2^31399941328 is an apocalyptic number.

It is an amenable number.

31399941328 is an abundant number, since it is smaller than the sum of its proper divisors (38128500432).

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

31399941328 is a wasteful number, since it uses less digits than its factorization.

31399941328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280356634 (or 280356628 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 52.

The spelling of 31399941328 in words is "thirty-one billion, three hundred ninety-nine million, nine hundred forty-one thousand, three hundred twenty-eight".