1668828 has 24 divisors (see below), whose sum is σ = 4450432. Its totient is φ = 476784.

The previous prime is 1668803. The next prime is 1668833. The reversal of 1668828 is 8288661.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9850 + ... + 10017.

2^1668828 is an apocalyptic number.

It is an amenable number.

1668828 is an abundant number, since it is smaller than the sum of its proper divisors (2781604).

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

1668828 is a wasteful number, since it uses less digits than its factorization.

1668828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19881 (or 19879 counting only the distinct ones).

The product of its digits is 36864, while the sum is 39.

The square root of 1668828 is about 1291.8312583306. The cubic root of 1668828 is about 118.6143388920.

The spelling of 1668828 in words is "one million, six hundred sixty-eight thousand, eight hundred twenty-eight".