1728244 has 12 divisors (see below), whose sum is σ = 3456544. Its totient is φ = 740664.

The previous prime is 1728229. The next prime is 1728247. The reversal of 1728244 is 4428271.

1728244 is an admirable number.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 61723 = 1728244 / (1 + 7 + 2 + 8 + 2 + 4 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1728247) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 30834 + ... + 30889.

2^1728244 is an apocalyptic number.

1728244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1728244 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1728244 is a wasteful number, since it uses less digits than its factorization.

1728244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61734 (or 61732 counting only the distinct ones).

The product of its digits is 3584, while the sum is 28.

The square root of 1728244 is about 1314.6269432809. The cubic root of 1728244 is about 120.0056478823.

The spelling of 1728244 in words is "one million, seven hundred twenty-eight thousand, two hundred forty-four".