1687328 has 24 divisors (see below), whose sum is σ = 3375792. Its totient is φ = 830016.

The previous prime is 1687327. The next prime is 1687331. The reversal of 1687328 is 8237861.

It is not an unprimeable number, because it can be changed into a prime (1687327) 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, 1751 + ... + 2537.

It is an arithmetic number, because the mean of its divisors is an integer number (140658).

2^1687328 is an apocalyptic number.

It is an amenable number.

1687328 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

1687328 is an equidigital number, since it uses as much as digits as its factorization.

1687328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864 (or 856 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

The square root of 1687328 is about 1298.9719011588. The cubic root of 1687328 is about 119.0510338271.

The spelling of 1687328 in words is "one million, six hundred eighty-seven thousand, three hundred twenty-eight".