1728234 has 12 divisors (see below), whose sum is σ = 3744546. Its totient is φ = 576072.

The previous prime is 1728229. The next prime is 1728247. The reversal of 1728234 is 4328271.

It can be written as a sum of positive squares in only one way, i.e., 1096209 + 632025 = 1047^2 + 795^2 .

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1728198 and 1728207.

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 5 ways as a sum of consecutive naturals, for example, 47989 + ... + 48024.

2^1728234 is an apocalyptic number.

1728234 is an abundant number, since it is smaller than the sum of its proper divisors (2016312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1728234 is a wasteful number, since it uses less digits than its factorization.

1728234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96021 (or 96018 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 1728234 is about 1314.6231399150. The cubic root of 1728234 is about 120.0054164222.

The spelling of 1728234 in words is "one million, seven hundred twenty-eight thousand, two hundred thirty-four".