1745728 has 14 divisors (see below), whose sum is σ = 3464306. Its totient is φ = 872832.

The previous prime is 1745717. The next prime is 1745729. The reversal of 1745728 is 8275471.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1272384 + 473344 = 1128^2 + 688^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1745693 and 1745702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1745729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13575 + ... + 13702.

2^1745728 is an apocalyptic number.

It is an amenable number.

1745728 is a deficient number, since it is larger than the sum of its proper divisors (1718578).

1745728 is an equidigital number, since it uses as much as digits as its factorization.

1745728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27289 (or 27279 counting only the distinct ones).

The product of its digits is 15680, while the sum is 34.

The square root of 1745728 is about 1321.2600046925. The cubic root of 1745728 is about 120.4089749493.

The spelling of 1745728 in words is "one million, seven hundred forty-five thousand, seven hundred twenty-eight".