1680086 has 16 divisors (see below), whose sum is σ = 2646000. Its totient is φ = 799008.

The previous prime is 1680079. The next prime is 1680089. The reversal of 1680086 is 6800861.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4640 + ... + 4988.

It is an arithmetic number, because the mean of its divisors is an integer number (165375).

2^1680086 is an apocalyptic number.

1680086 is a deficient number, since it is larger than the sum of its proper divisors (965914).

1680086 is a wasteful number, since it uses less digits than its factorization.

1680086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 1680086 is about 1296.1813144773. The cubic root of 1680086 is about 118.8804675020.

The spelling of 1680086 in words is "one million, six hundred eighty thousand, eighty-six".