1680344 has 32 divisors (see below), whose sum is σ = 3326400. Its totient is φ = 794880.

The previous prime is 1680323. The next prime is 1680359. The reversal of 1680344 is 4430861.

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 in 7 ways as a sum of consecutive naturals, for example, 15362 + ... + 15470.

It is an arithmetic number, because the mean of its divisors is an integer number (103950).

2^1680344 is an apocalyptic number.

It is an amenable number.

1680344 is a deficient number, since it is larger than the sum of its proper divisors (1646056).

1680344 is a wasteful number, since it uses less digits than its factorization.

1680344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 1680344 is about 1296.2808337702. The cubic root of 1680344 is about 118.8865524267.

The spelling of 1680344 in words is "one million, six hundred eighty thousand, three hundred forty-four".