1728446 has 4 divisors (see below), whose sum is σ = 2592672. Its totient is φ = 864222.

The previous prime is 1728439. The next prime is 1728451. The reversal of 1728446 is 6448271.

It is a semiprime because it is the product of two primes.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432110 + ... + 432113.

It is an arithmetic number, because the mean of its divisors is an integer number (648168).

2^1728446 is an apocalyptic number.

1728446 is a deficient number, since it is larger than the sum of its proper divisors (864226).

1728446 is an equidigital number, since it uses as much as digits as its factorization.

1728446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864225.

The product of its digits is 10752, while the sum is 32.

The square root of 1728446 is about 1314.7037689153. The cubic root of 1728446 is about 120.0103231860.

The spelling of 1728446 in words is "one million, seven hundred twenty-eight thousand, four hundred forty-six".