1728266 has 8 divisors (see below), whose sum is σ = 2705184. Its totient is φ = 826540.

The previous prime is 1728257. The next prime is 1728269. The reversal of 1728266 is 6628271.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1728269) 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 3 ways as a sum of consecutive naturals, for example, 18740 + ... + 18831.

It is an arithmetic number, because the mean of its divisors is an integer number (338148).

2^1728266 is an apocalyptic number.

1728266 is a deficient number, since it is larger than the sum of its proper divisors (976918).

1728266 is a wasteful number, since it uses less digits than its factorization.

1728266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37596.

The product of its digits is 8064, while the sum is 32.

The square root of 1728266 is about 1314.6353106470. The cubic root of 1728266 is about 120.0061570915.

The spelling of 1728266 in words is "one million, seven hundred twenty-eight thousand, two hundred sixty-six".