728229 has 16 divisors (see below), whose sum is σ = 1045440. Its totient is φ = 449280.

The previous prime is 728209. The next prime is 728261. The reversal of 728229 is 922827.

728229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 728229 - 2⁹ = 727717 is a prime.

728229 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 728196 and 728205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5494 + ... + 5624.

It is an arithmetic number, because the mean of its divisors is an integer number (65340).

2⁷²⁸²²⁹ is an apocalyptic number.

It is an amenable number.

728229 is a deficient number, since it is larger than the sum of its proper divisors (317211).

728229 is a wasteful number, since it uses less digits than its factorization.

728229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260.

The product of its digits is 4032, while the sum is 30.

The square root of 728229 is about 853.3633458264. The cubic root of 728229 is about 89.9682604129.

The spelling of 728229 in words is "seven hundred twenty-eight thousand, two hundred twenty-nine".