1728285 has 16 divisors (see below), whose sum is σ = 2978304. Its totient is φ = 850752.

The previous prime is 1728269. The next prime is 1728317. The reversal of 1728285 is 5828271.

It is not a de Polignac number, because 1728285 - 2⁴ = 1728269 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4237 + ... + 4626.

It is an arithmetic number, because the mean of its divisors is an integer number (186144).

2^1728285 is an apocalyptic number.

1728285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1728285 is a deficient number, since it is larger than the sum of its proper divisors (1250019).

1728285 is a wasteful number, since it uses less digits than its factorization.

1728285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8884.

The product of its digits is 8960, while the sum is 33.

The square root of 1728285 is about 1314.6425369658. The cubic root of 1728285 is about 120.0065968596.

The spelling of 1728285 in words is "one million, seven hundred twenty-eight thousand, two hundred eighty-five".