1999604 has 12 divisors (see below), whose sum is σ = 3511200. Its totient is φ = 996408.

The previous prime is 1999603. The next prime is 1999607. The reversal of 1999604 is 4069991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999603) by changing a digit.

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, 857 + ... + 2175.

It is an arithmetic number, because the mean of its divisors is an integer number (292600).

2^1999604 is an apocalyptic number.

It is an amenable number.

1999604 is a deficient number, since it is larger than the sum of its proper divisors (1511596).

1999604 is a wasteful number, since it uses less digits than its factorization.

1999604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1702 (or 1700 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 1999604 is about 1414.0735482994. The cubic root of 1999604 is about 125.9837889617.

The spelling of 1999604 in words is "one million, nine hundred ninety-nine thousand, six hundred four".