1728923 has 8 divisors (see below), whose sum is σ = 2008800. Its totient is φ = 1457280.

The previous prime is 1728911. The next prime is 1728949. The reversal of 1728923 is 3298271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1728923 - 2⁴ = 1728907 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1728923.

It is not an unprimeable number, because it can be changed into a prime (1728953) by changing a digit.

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, 1598 + ... + 2451.

It is an arithmetic number, because the mean of its divisors is an integer number (251100).

2^1728923 is an apocalyptic number.

1728923 is a deficient number, since it is larger than the sum of its proper divisors (279877).

1728923 is an equidigital number, since it uses as much as digits as its factorization.

1728923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4117.

The product of its digits is 6048, while the sum is 32.

The square root of 1728923 is about 1314.8851660887. The cubic root of 1728923 is about 120.0213619377.

The spelling of 1728923 in words is "one million, seven hundred twenty-eight thousand, nine hundred twenty-three".