1728668732 has 96 divisors (see below), whose sum is σ = 3791442816. Its totient is φ = 672768000.

The previous prime is 1728668701. The next prime is 1728668741. The reversal of 1728668732 is 2378668271.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1970678 + ... + 1971554.

It is an arithmetic number, because the mean of its divisors is an integer number (39494196).

Almost surely, 2^1728668732 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1728668732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1895721408).

1728668732 is an abundant number, since it is smaller than the sum of its proper divisors (2062774084).

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

1728668732 is a wasteful number, since it uses less digits than its factorization.

1728668732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047 (or 1045 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 50.

The square root of 1728668732 is about 41577.2621994282. The cubic root of 1728668732 is about 1200.1547791094.

The spelling of 1728668732 in words is "one billion, seven hundred twenty-eight million, six hundred sixty-eight thousand, seven hundred thirty-two".