1680864 has 24 divisors (see below), whose sum is σ = 4412520. Its totient is φ = 560256.

The previous prime is 1680859. The next prime is 1680871. The reversal of 1680864 is 4680861.

It is a tau number, because it is divible by the number of its divisors (24).

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, 8659 + ... + 8850.

It is an arithmetic number, because the mean of its divisors is an integer number (183855).

2^1680864 is an apocalyptic number.

It is an amenable number.

1680864 is an abundant number, since it is smaller than the sum of its proper divisors (2731656).

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

1680864 is a wasteful number, since it uses less digits than its factorization.

1680864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17522 (or 17514 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 1680864 is about 1296.4813920763. The cubic root of 1680864 is about 118.8988147237.

The spelling of 1680864 in words is "one million, six hundred eighty thousand, eight hundred sixty-four".