1668984 has 32 divisors (see below), whose sum is σ = 4205520. Its totient is φ = 551936.

The previous prime is 1668983. The next prime is 1669027. The reversal of 1668984 is 4898661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668983) 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 7 ways as a sum of consecutive naturals, for example, 4552 + ... + 4904.

2^1668984 is an apocalyptic number.

It is an amenable number.

1668984 is an abundant number, since it is smaller than the sum of its proper divisors (2536536).

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

1668984 is a wasteful number, since it uses less digits than its factorization.

1668984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559 (or 555 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 1668984 is about 1291.8916363225. The cubic root of 1668984 is about 118.6180347513.

The spelling of 1668984 in words is "one million, six hundred sixty-eight thousand, nine hundred eighty-four".