31728571460 has 12 divisors (see below), whose sum is σ = 66630000108. Its totient is φ = 12691428576.

The previous prime is 31728571453. The next prime is 31728571471. The reversal of 31728571460 is 6417582713.

It can be written as a sum of positive squares in 2 ways, for example, as 23524197376 + 8204374084 = 153376^2 + 90578^2 .

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, 793214267 + ... + 793214306.

It is an arithmetic number, because the mean of its divisors is an integer number (5552500009).

Almost surely, 2^31728571460 is an apocalyptic number.

It is an amenable number.

31728571460 is an abundant number, since it is smaller than the sum of its proper divisors (34901428648).

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

31728571460 is a wasteful number, since it uses less digits than its factorization.

31728571460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586428582 (or 1586428580 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 44.

The spelling of 31728571460 in words is "thirty-one billion, seven hundred twenty-eight million, five hundred seventy-one thousand, four hundred sixty".