1731312872 has 16 divisors (see below), whose sum is σ = 3248514240. Its totient is φ = 865042416.

The previous prime is 1731312871. The next prime is 1731312901. The reversal of 1731312872 is 2782131371.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1731312871) by changing a digit.

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, 64658 + ... + 87425.

It is an arithmetic number, because the mean of its divisors is an integer number (203032140).

Almost surely, 2^1731312872 is an apocalyptic number.

It is an amenable number.

1731312872 is a deficient number, since it is larger than the sum of its proper divisors (1517201368).

1731312872 is a wasteful number, since it uses less digits than its factorization.

1731312872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153512 (or 153508 counting only the distinct ones).

The product of its digits is 14112, while the sum is 35.

The square root of 1731312872 is about 41609.0479583468. The cubic root of 1731312872 is about 1200.7663789671.

The spelling of 1731312872 in words is "one billion, seven hundred thirty-one million, three hundred twelve thousand, eight hundred seventy-two".