1728028 has 6 divisors (see below), whose sum is σ = 3024056. Its totient is φ = 864012.

The previous prime is 1728019. The next prime is 1728043. The reversal of 1728028 is 8208271.

It is a junction number, because it is equal to n+sod(n) for n = 1727987 and 1728005.

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, 216000 + ... + 216007.

2^1728028 is an apocalyptic number.

It is an amenable number.

1728028 is a deficient number, since it is larger than the sum of its proper divisors (1296028).

1728028 is a wasteful number, since it uses less digits than its factorization.

1728028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432011 (or 432009 counting only the distinct ones).

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

The square root of 1728028 is about 1314.5447881301. The cubic root of 1728028 is about 120.0006481446. Note that the first 3 decimals are identical.

Subtracting from 1728028 its sum of digits (28), we obtain a cube (1728000 = 120³).

The spelling of 1728028 in words is "one million, seven hundred twenty-eight thousand, twenty-eight".