728227 has 4 divisors (see below), whose sum is σ = 729936. Its totient is φ = 726520.

The previous prime is 728209. The next prime is 728261. The reversal of 728227 is 722827.

728227 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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 728195 and 728204.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378 + ... + 1264.

It is an arithmetic number, because the mean of its divisors is an integer number (182484).

2⁷²⁸²²⁷ is an apocalyptic number.

728227 is a deficient number, since it is larger than the sum of its proper divisors (1709).

728227 is an equidigital number, since it uses as much as digits as its factorization.

728227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708.

The product of its digits is 3136, while the sum is 28.

The square root of 728227 is about 853.3621739918. The cubic root of 728227 is about 89.9681780502.

The spelling of 728227 in words is "seven hundred twenty-eight thousand, two hundred twenty-seven".