728901 has 6 divisors (see below), whose sum is σ = 1052870. Its totient is φ = 485928.

The previous prime is 728899. The next prime is 728911. The reversal of 728901 is 109827.

728901 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 720801 + 8100 = 849^2 + 90^2 .

It is not a de Polignac number, because 728901 - 2¹ = 728899 is a prime.

It is a Duffinian number.

728901 is strictly pandigital in base 7.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728911) 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, 40486 + ... + 40503.

2⁷²⁸⁹⁰¹ is an apocalyptic number.

It is an amenable number.

728901 is a deficient number, since it is larger than the sum of its proper divisors (323969).

728901 is a wasteful number, since it uses less digits than its factorization.

728901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80995 (or 80992 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 728901 is about 853.7569911866. The cubic root of 728901 is about 89.9959257415.

The spelling of 728901 in words is "seven hundred twenty-eight thousand, nine hundred one".