1728338 has 4 divisors (see below), whose sum is σ = 2592510. Its totient is φ = 864168.

The previous prime is 1728329. The next prime is 1728341. The reversal of 1728338 is 8338271.

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

It can be written as a sum of positive squares in only one way, i.e., 1352569 + 375769 = 1163^2 + 613^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432083 + ... + 432086.

2^1728338 is an apocalyptic number.

1728338 is a deficient number, since it is larger than the sum of its proper divisors (864172).

1728338 is an equidigital number, since it uses as much as digits as its factorization.

1728338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864171.

The product of its digits is 8064, while the sum is 32.

The square root of 1728338 is about 1314.6626943821. The cubic root of 1728338 is about 120.0078235640.

The spelling of 1728338 in words is "one million, seven hundred twenty-eight thousand, three hundred thirty-eight".