1728366 has 8 divisors (see below), whose sum is σ = 3456744. Its totient is φ = 576120.

The previous prime is 1728361. The next prime is 1728403. The reversal of 1728366 is 6638271.

It is a sphenic number, since it is the product of 3 distinct primes.

1728366 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1728361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144025 + ... + 144036.

It is an arithmetic number, because the mean of its divisors is an integer number (432093).

2^1728366 is an apocalyptic number.

1728366 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.

1728366 is a wasteful number, since it uses less digits than its factorization.

1728366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288066.

The product of its digits is 12096, while the sum is 33.

The square root of 1728366 is about 1314.6733434584. The cubic root of 1728366 is about 120.0084716241.

The spelling of 1728366 in words is "one million, seven hundred twenty-eight thousand, three hundred sixty-six".