1728194 has 12 divisors (see below), whose sum is σ = 2807586. Its totient is φ = 797472.

The previous prime is 1728193. The next prime is 1728229. The reversal of 1728194 is 4918271.

It can be written as a sum of positive squares in 3 ways, for example, as 319225 + 1408969 = 565^2 + 1187^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1728194.

It is not an unprimeable number, because it can be changed into a prime (1728193) 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 5 ways as a sum of consecutive naturals, for example, 2219 + ... + 2894.

2^1728194 is an apocalyptic number.

1728194 is a deficient number, since it is larger than the sum of its proper divisors (1079392).

1728194 is a wasteful number, since it uses less digits than its factorization.

1728194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5141 (or 5128 counting only the distinct ones).

The product of its digits is 4032, while the sum is 32.

The square root of 1728194 is about 1314.6079263415. The cubic root of 1728194 is about 120.0044905727.

The spelling of 1728194 in words is "one million, seven hundred twenty-eight thousand, one hundred ninety-four".