1680884 has 6 divisors (see below), whose sum is σ = 2941554. Its totient is φ = 840440.

The previous prime is 1680881. The next prime is 1680893. The reversal of 1680884 is 4880861.

It can be written as a sum of positive squares in only one way, i.e., 1056784 + 624100 = 1028^2 + 790^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210107 + ... + 210114.

It is an arithmetic number, because the mean of its divisors is an integer number (490259).

2^1680884 is an apocalyptic number.

It is an amenable number.

1680884 is a deficient number, since it is larger than the sum of its proper divisors (1260670).

1680884 is a wasteful number, since it uses less digits than its factorization.

1680884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420225 (or 420223 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 1680884 is about 1296.4891052377. The cubic root of 1680884 is about 118.8992863000.

The spelling of 1680884 in words is "one million, six hundred eighty thousand, eight hundred eighty-four".