728206 has 4 divisors (see below), whose sum is σ = 1092312. Its totient is φ = 364102.

The previous prime is 728191. The next prime is 728207. The reversal of 728206 is 602827.

728206 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 602827 = 211 ⋅2857.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728207) by changing a digit.

728206 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 182050 + ... + 182053.

It is an arithmetic number, because the mean of its divisors is an integer number (273078).

2⁷²⁸²⁰⁶ is an apocalyptic number.

728206 is a deficient number, since it is larger than the sum of its proper divisors (364106).

728206 is a wasteful number, since it uses less digits than its factorization.

728206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364105.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 728206 is about 853.3498696314. The cubic root of 728206 is about 89.9673132329.

The spelling of 728206 in words is "seven hundred twenty-eight thousand, two hundred six".