1531728712 has 16 divisors (see below), whose sum is σ = 2894607360. Its totient is φ = 759833424.

The previous prime is 1531728707. The next prime is 1531728721. The reversal of 1531728712 is 2178271351.

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, 752788 + ... + 754819.

It is an arithmetic number, because the mean of its divisors is an integer number (180912960).

Almost surely, 2^1531728712 is an apocalyptic number.

It is an amenable number.

1531728712 is a deficient number, since it is larger than the sum of its proper divisors (1362878648).

1531728712 is a wasteful number, since it uses less digits than its factorization.

1531728712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1507740 (or 1507736 counting only the distinct ones).

The product of its digits is 23520, while the sum is 37.

The square root of 1531728712 is about 39137.3058858169. The cubic root of 1531728712 is about 1152.7291732171.

The spelling of 1531728712 in words is "one billion, five hundred thirty-one million, seven hundred twenty-eight thousand, seven hundred twelve".