728223 has 8 divisors (see below), whose sum is σ = 985728. Its totient is φ = 478104.

The previous prime is 728209. The next prime is 728261. The reversal of 728223 is 322827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 728223 - 2⁴ = 728207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 728193 and 728202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1611 + ... + 2012.

It is an arithmetic number, because the mean of its divisors is an integer number (123216).

2⁷²⁸²²³ is an apocalyptic number.

728223 is a deficient number, since it is larger than the sum of its proper divisors (257505).

728223 is a wasteful number, since it uses less digits than its factorization.

728223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3693.

The product of its digits is 1344, while the sum is 24.

The square root of 728223 is about 853.3598303178. The cubic root of 728223 is about 89.9680133244.

The spelling of 728223 in words is "seven hundred twenty-eight thousand, two hundred twenty-three".