1664744 has 16 divisors (see below), whose sum is σ = 3175200. Its totient is φ = 818032.

The previous prime is 1664713. The next prime is 1664771. The reversal of 1664744 is 4474661.

It is a self number, because there is not a number n which added to its sum of digits gives 1664744.

It is an unprimeable number.

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, 1292 + ... + 2235.

It is an arithmetic number, because the mean of its divisors is an integer number (198450).

2^1664744 is an apocalyptic number.

It is an amenable number.

1664744 is a deficient number, since it is larger than the sum of its proper divisors (1510456).

1664744 is a wasteful number, since it uses less digits than its factorization.

1664744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3592 (or 3588 counting only the distinct ones).

The product of its digits is 16128, while the sum is 32.

The square root of 1664744 is about 1290.2495882580. The cubic root of 1664744 is about 118.5175011390.

The spelling of 1664744 in words is "one million, six hundred sixty-four thousand, seven hundred forty-four".