1680944 has 20 divisors (see below), whose sum is σ = 3362880. Its totient is φ = 813120.

The previous prime is 1680929. The next prime is 1680961. The reversal of 1680944 is 4490861.

1680944 is an admirable number.

It is a super-2 number, since 2×1680944² = 5651145462272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1680944.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1199 + ... + 2190.

It is an arithmetic number, because the mean of its divisors is an integer number (168144).

2^1680944 is an apocalyptic number.

It is an amenable number.

1680944 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1680944 is a wasteful number, since it uses less digits than its factorization.

1680944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3428 (or 3422 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1680944 is about 1296.5122444466. The cubic root of 1680944 is about 118.9007010064.

The spelling of 1680944 in words is "one million, six hundred eighty thousand, nine hundred forty-four".