1684328 has 16 divisors (see below), whose sum is σ = 3178980. Its totient is φ = 836608.

The previous prime is 1684327. The next prime is 1684337. The reversal of 1684328 is 8234861.

It can be written as a sum of positive squares in 2 ways, for example, as 1643524 + 40804 = 1282^2 + 202^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1684294 and 1684303.

It is not an unprimeable number, because it can be changed into a prime (1684327) 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, 776 + ... + 1992.

2^1684328 is an apocalyptic number.

It is an amenable number.

1684328 is a deficient number, since it is larger than the sum of its proper divisors (1494652).

1684328 is a wasteful number, since it uses less digits than its factorization.

1684328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396 (or 1392 counting only the distinct ones).

The product of its digits is 9216, while the sum is 32.

The square root of 1684328 is about 1297.8166280334. The cubic root of 1684328 is about 118.9804360183.

The spelling of 1684328 in words is "one million, six hundred eighty-four thousand, three hundred twenty-eight".