1680326 has 4 divisors (see below), whose sum is σ = 2520492. Its totient is φ = 840162.

The previous prime is 1680323. The next prime is 1680359. The reversal of 1680326 is 6230861.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 1680295 and 1680304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680323) 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 as a sum of consecutive naturals, namely, 420080 + ... + 420083.

It is an arithmetic number, because the mean of its divisors is an integer number (630123).

2^1680326 is an apocalyptic number.

1680326 is a deficient number, since it is larger than the sum of its proper divisors (840166).

1680326 is an equidigital number, since it uses as much as digits as its factorization.

1680326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840165.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1680326 is about 1296.2738908117. The cubic root of 1680326 is about 118.8861279173.

The spelling of 1680326 in words is "one million, six hundred eighty thousand, three hundred twenty-six".