728726 has 16 divisors (see below), whose sum is σ = 1167360. Its totient is φ = 340200.

The previous prime is 728723. The next prime is 728729. The reversal of 728726 is 627827.

It is an interprime number because it is at equal distance from previous prime (728723) and next prime (728729).

It is a junction number, because it is equal to n+sod(n) for n = 728692 and 728701.

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 728726.

It is not an unprimeable number, because it can be changed into a prime (728723) 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 7 ways as a sum of consecutive naturals, for example, 4751 + ... + 4901.

It is an arithmetic number, because the mean of its divisors is an integer number (72960).

2⁷²⁸⁷²⁶ is an apocalyptic number.

728726 is a deficient number, since it is larger than the sum of its proper divisors (438634).

728726 is a wasteful number, since it uses less digits than its factorization.

728726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299.

The product of its digits is 9408, while the sum is 32.

The square root of 728726 is about 853.6544968546. The cubic root of 728726 is about 89.9887228669.

The spelling of 728726 in words is "seven hundred twenty-eight thousand, seven hundred twenty-six".