728394 has 16 divisors (see below), whose sum is σ = 1477632. Its totient is φ = 239328.

The previous prime is 728383. The next prime is 728417. The reversal of 728394 is 493827.

728394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 394 + ... + 1269.

It is an arithmetic number, because the mean of its divisors is an integer number (92352).

2⁷²⁸³⁹⁴ is an apocalyptic number.

728394 is an abundant number, since it is smaller than the sum of its proper divisors (749238).

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

728394 is a wasteful number, since it uses less digits than its factorization.

728394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1741.

The product of its digits is 12096, while the sum is 33.

The square root of 728394 is about 853.4600166382. The cubic root of 728394 is about 89.9750548150.

Adding to 728394 its reverse (493827), we get a palindrome (1222221).

The spelling of 728394 in words is "seven hundred twenty-eight thousand, three hundred ninety-four".