1728642 has 16 divisors (see below), whose sum is σ = 3542112. Its totient is φ = 562080.

The previous prime is 1728593. The next prime is 1728659. The reversal of 1728642 is 2468271.

1728642 is nontrivially palindromic in base 9.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3268 + ... + 3759.

It is an arithmetic number, because the mean of its divisors is an integer number (221382).

2^1728642 is an apocalyptic number.

1728642 is an abundant number, since it is smaller than the sum of its proper divisors (1813470).

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

1728642 is a wasteful number, since it uses less digits than its factorization.

1728642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7073.

The product of its digits is 5376, while the sum is 30.

The square root of 1728642 is about 1314.7783083090. The cubic root of 1728642 is about 120.0148592711.

The spelling of 1728642 in words is "one million, seven hundred twenty-eight thousand, six hundred forty-two".