1680838 has 8 divisors (see below), whose sum is σ = 2529360. Its totient is φ = 837720.

The previous prime is 1680823. The next prime is 1680839. The reversal of 1680838 is 8380861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680839) 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 3 ways as a sum of consecutive naturals, for example, 453 + ... + 1888.

It is an arithmetic number, because the mean of its divisors is an integer number (316170).

2^1680838 is an apocalyptic number.

1680838 is a deficient number, since it is larger than the sum of its proper divisors (848522).

1680838 is a wasteful number, since it uses less digits than its factorization.

1680838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2702.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 1680838 is about 1296.4713648978. The cubic root of 1680838 is about 118.8982016689.

The spelling of 1680838 in words is "one million, six hundred eighty thousand, eight hundred thirty-eight".