728408 has 16 divisors (see below), whose sum is σ = 1383480. Its totient is φ = 359488.

The previous prime is 728383. The next prime is 728417. The reversal of 728408 is 804827.

728408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116 + ... + 1212.

2⁷²⁸⁴⁰⁸ is an apocalyptic number.

It is an amenable number.

728408 is a deficient number, since it is larger than the sum of its proper divisors (655072).

728408 is a wasteful number, since it uses less digits than its factorization.

728408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1186 (or 1182 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 728408 is about 853.4682185061. The cubic root of 728408 is about 89.9756312625.

The spelling of 728408 in words is "seven hundred twenty-eight thousand, four hundred eight".