1668838 has 8 divisors (see below), whose sum is σ = 2544480. Its totient is φ = 820680.

The previous prime is 1668833. The next prime is 1668847. The reversal of 1668838 is 8388661.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1668838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6718 + ... + 6961.

It is an arithmetic number, because the mean of its divisors is an integer number (318060).

2^1668838 is an apocalyptic number.

1668838 is a deficient number, since it is larger than the sum of its proper divisors (875642).

1668838 is a wasteful number, since it uses less digits than its factorization.

1668838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13742.

The product of its digits is 55296, while the sum is 40.

The square root of 1668838 is about 1291.8351287993. The cubic root of 1668838 is about 118.6145758129.

The spelling of 1668838 in words is "one million, six hundred sixty-eight thousand, eight hundred thirty-eight".