1799664 has 20 divisors (see below), whose sum is σ = 4649256. Its totient is φ = 599872.

The previous prime is 1799639. The next prime is 1799701. The reversal of 1799664 is 4669971.

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 3 ways as a sum of consecutive naturals, for example, 18699 + ... + 18794.

2^1799664 is an apocalyptic number.

It is an amenable number.

1799664 is an abundant number, since it is smaller than the sum of its proper divisors (2849592).

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

1799664 is a wasteful number, since it uses less digits than its factorization.

1799664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37504 (or 37498 counting only the distinct ones).

The product of its digits is 81648, while the sum is 42.

The square root of 1799664 is about 1341.5155608490. The cubic root of 1799664 is about 121.6364704780.

It can be divided in two parts, 17 and 99664, that added together give a triangular number (99681 = T₄₄₆).

The spelling of 1799664 in words is "one million, seven hundred ninety-nine thousand, six hundred sixty-four".