1728208 has 10 divisors (see below), whose sum is σ = 3348434. Its totient is φ = 864096.

The previous prime is 1728193. The next prime is 1728229. The reversal of 1728208 is 8028271.

It can be written as a sum of positive squares in only one way, i.e., 1617984 + 110224 = 1272^2 + 332^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 53991 + ... + 54022.

2^1728208 is an apocalyptic number.

It is an amenable number.

1728208 is a deficient number, since it is larger than the sum of its proper divisors (1620226).

1728208 is a wasteful number, since it uses less digits than its factorization.

1728208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108021 (or 108015 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 1728208 is about 1314.6132511123. The cubic root of 1728208 is about 120.0048146216.

It can be divided in two parts, 1728 and 208, that added together give a square (1936 = 44²).

The spelling of 1728208 in words is "one million, seven hundred twenty-eight thousand, two hundred eight".