1728842 has 8 divisors (see below), whose sum is σ = 2600256. Its totient is φ = 862092.

The previous prime is 1728827. The next prime is 1728871. The reversal of 1728842 is 2488271.

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1728799 and 1728808.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8 + ... + 1859.

It is an arithmetic number, because the mean of its divisors is an integer number (325032).

2^1728842 is an apocalyptic number.

1728842 is a deficient number, since it is larger than the sum of its proper divisors (871414).

1728842 is a wasteful number, since it uses less digits than its factorization.

1728842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2332.

The product of its digits is 7168, while the sum is 32.

The square root of 1728842 is about 1314.8543645591. The cubic root of 1728842 is about 120.0194875759.

The spelling of 1728842 in words is "one million, seven hundred twenty-eight thousand, eight hundred forty-two".