1680056 has 32 divisors (see below), whose sum is σ = 3792000. Its totient is φ = 681696.

The previous prime is 1680023. The next prime is 1680071. The reversal of 1680056 is 6500861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275 + ... + 1853.

It is an arithmetic number, because the mean of its divisors is an integer number (118500).

2^1680056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1680056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1896000).

1680056 is an abundant number, since it is smaller than the sum of its proper divisors (2111944).

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

1680056 is a wasteful number, since it uses less digits than its factorization.

1680056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611 (or 1607 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 1680056 is about 1296.1697419705. The cubic root of 1680056 is about 118.8797599121.

The spelling of 1680056 in words is "one million, six hundred eighty thousand, fifty-six".