1680288 has 48 divisors (see below), whose sum is σ = 4608576. Its totient is φ = 535040.

The previous prime is 1680277. The next prime is 1680313. The reversal of 1680288 is 8820861.

It is a tau number, because it is divible by the number of its divisors (48).

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, 1828 + ... + 2588.

It is an arithmetic number, because the mean of its divisors is an integer number (96012).

2^1680288 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 1680288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2304288).

1680288 is an abundant number, since it is smaller than the sum of its proper divisors (2928288).

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

1680288 is a wasteful number, since it uses less digits than its factorization.

1680288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797 (or 789 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 1680288 is about 1296.2592333326. The cubic root of 1680288 is about 118.8852317208.

The spelling of 1680288 in words is "one million, six hundred eighty thousand, two hundred eighty-eight".