1680216 has 16 divisors (see below), whose sum is σ = 4200600. Its totient is φ = 560064.

The previous prime is 1680191. The next prime is 1680247. The reversal of 1680216 is 6120861.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 70009 = 1680216 / (1 + 6 + 8 + 0 + 2 + 1 + 6).

1680216 is a modest number, since divided by 216 gives 168 as remainder.

It is a congruent number.

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, 34981 + ... + 35028.

2^1680216 is an apocalyptic number.

It is an amenable number.

1680216 is an abundant number, since it is smaller than the sum of its proper divisors (2520384).

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

1680216 is a wasteful number, since it uses less digits than its factorization.

1680216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70018 (or 70014 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1680216 is about 1296.2314608125. The cubic root of 1680216 is about 118.8835336272.

The spelling of 1680216 in words is "one million, six hundred eighty thousand, two hundred sixteen".