728398 has 16 divisors (see below), whose sum is σ = 1206576. Its totient is φ = 327040.

The previous prime is 728383. The next prime is 728417. The reversal of 728398 is 893827.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2340 + ... + 2632.

It is an arithmetic number, because the mean of its divisors is an integer number (75411).

2⁷²⁸³⁹⁸ is an apocalyptic number.

728398 is a deficient number, since it is larger than the sum of its proper divisors (478178).

728398 is a wasteful number, since it uses less digits than its factorization.

728398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419.

The product of its digits is 24192, while the sum is 37.

The square root of 728398 is about 853.4623600370. The cubic root of 728398 is about 89.9752195150.

It can be divided in two parts, 7283 and 98, that added together give a triangular number (7381 = T₁₂₁).

The spelling of 728398 in words is "seven hundred twenty-eight thousand, three hundred ninety-eight".