728678 has 16 divisors (see below), whose sum is σ = 1153680. Its totient is φ = 344736.

The previous prime is 728659. The next prime is 728681. The reversal of 728678 is 876827.

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, 3068 + ... + 3296.

It is an arithmetic number, because the mean of its divisors is an integer number (72105).

2⁷²⁸⁶⁷⁸ is an apocalyptic number.

728678 is a deficient number, since it is larger than the sum of its proper divisors (425002).

728678 is a wasteful number, since it uses less digits than its factorization.

728678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311.

The product of its digits is 37632, while the sum is 38.

The square root of 728678 is about 853.6263819728. The cubic root of 728678 is about 89.9867470197.

The spelling of 728678 in words is "seven hundred twenty-eight thousand, six hundred seventy-eight".