1664984 has 16 divisors (see below), whose sum is σ = 3165720. Its totient is φ = 820800.

The previous prime is 1664959. The next prime is 1664987. The reversal of 1664984 is 4894661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 842 + ... + 2009.

2^1664984 is an apocalyptic number.

It is an amenable number.

1664984 is a deficient number, since it is larger than the sum of its proper divisors (1500736).

1664984 is a wasteful number, since it uses less digits than its factorization.

1664984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2930 (or 2926 counting only the distinct ones).

The product of its digits is 41472, while the sum is 38.

The square root of 1664984 is about 1290.3425901674. The cubic root of 1664984 is about 118.5231962756.

The spelling of 1664984 in words is "one million, six hundred sixty-four thousand, nine hundred eighty-four".