1679728 has 20 divisors (see below), whose sum is σ = 3274840. Its totient is φ = 834624.

The previous prime is 1679723. The next prime is 1679773. The reversal of 1679728 is 8279761.

It is a d-powerful number, because it can be written as 1 + 6⁸ + 7 + 9² + 7 + 2³ + 8 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1679723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4243 + ... + 4621.

It is an arithmetic number, because the mean of its divisors is an integer number (163742).

2^1679728 is an apocalyptic number.

It is an amenable number.

1679728 is a deficient number, since it is larger than the sum of its proper divisors (1595112).

1679728 is a wasteful number, since it uses less digits than its factorization.

1679728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664 (or 658 counting only the distinct ones).

The product of its digits is 42336, while the sum is 40.

The square root of 1679728 is about 1296.0432091562. The cubic root of 1679728 is about 118.8720230472.

The spelling of 1679728 in words is "one million, six hundred seventy-nine thousand, seven hundred twenty-eight".