683728 has 20 divisors (see below), whose sum is σ = 1338208. Its totient is φ = 338400.

The previous prime is 683719. The next prime is 683731. The reversal of 683728 is 827386.

It is a happy number.

683728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 683693 and 683702.

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, 2275 + ... + 2557.

2⁶⁸³⁷²⁸ is an apocalyptic number.

It is an amenable number.

683728 is a deficient number, since it is larger than the sum of its proper divisors (654480).

683728 is a wasteful number, since it uses less digits than its factorization.

683728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442 (or 436 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 683728 is about 826.8784674908. The cubic root of 683728 is about 88.0970004772.

The spelling of 683728 in words is "six hundred eighty-three thousand, seven hundred twenty-eight".