31731428860 has 12 divisors (see below), whose sum is σ = 66636000648. Its totient is φ = 12692571536.

The previous prime is 31731428851. The next prime is 31731428893. The reversal of 31731428860 is 6882413713.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 793285702 + ... + 793285741.

It is an arithmetic number, because the mean of its divisors is an integer number (5553000054).

Almost surely, 2^31731428860 is an apocalyptic number.

It is an amenable number.

31731428860 is an abundant number, since it is smaller than the sum of its proper divisors (34904571788).

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

31731428860 is a wasteful number, since it uses less digits than its factorization.

31731428860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586571452 (or 1586571450 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The spelling of 31731428860 in words is "thirty-one billion, seven hundred thirty-one million, four hundred twenty-eight thousand, eight hundred sixty".