728226 has 24 divisors (see below), whose sum is σ = 1647360. Its totient is φ = 232056.

The previous prime is 728209. The next prime is 728261. The reversal of 728226 is 622827.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 728226.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 466 + ... + 1293.

It is an arithmetic number, because the mean of its divisors is an integer number (68640).

2⁷²⁸²²⁶ is an apocalyptic number.

728226 is an abundant number, since it is smaller than the sum of its proper divisors (919134).

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

728226 is a wasteful number, since it uses less digits than its factorization.

728226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1790 (or 1787 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 728226 is about 853.3615880739. The cubic root of 728226 is about 89.9681368688.

The spelling of 728226 in words is "seven hundred twenty-eight thousand, two hundred twenty-six".