728732 has 18 divisors (see below), whose sum is σ = 1345848. Its totient is φ = 344608.

The previous prime is 728731. The next prime is 728743. The reversal of 728732 is 237827.

It is a junction number, because it is equal to n+sod(n) for n = 728695 and 728704.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 728732.

It is not an unprimeable number, because it can be changed into a prime (728731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8144 + ... + 8232.

2⁷²⁸⁷³² is an apocalyptic number.

It is an amenable number.

728732 is a deficient number, since it is larger than the sum of its proper divisors (617116).

728732 is a wasteful number, since it uses less digits than its factorization.

728732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205 (or 114 counting only the distinct ones).

The product of its digits is 4704, while the sum is 29.

The square root of 728732 is about 853.6580111497. The cubic root of 728732 is about 89.9889698416.

The spelling of 728732 in words is "seven hundred twenty-eight thousand, seven hundred thirty-two".