1680804 has 48 divisors (see below), whose sum is σ = 4435200. Its totient is φ = 550368.

The previous prime is 1680803. The next prime is 1680821. The reversal of 1680804 is 4080861.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1680803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8434 + ... + 8630.

It is an arithmetic number, because the mean of its divisors is an integer number (92400).

2^1680804 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 1680804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2217600).

1680804 is an abundant number, since it is smaller than the sum of its proper divisors (2754396).

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

1680804 is a wasteful number, since it uses less digits than its factorization.

1680804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 1680804 is about 1296.4582523167. The cubic root of 1680804 is about 118.8973999723.

The spelling of 1680804 in words is "one million, six hundred eighty thousand, eight hundred four".