2009804 has 6 divisors (see below), whose sum is σ = 3517164. Its totient is φ = 1004900.

The previous prime is 2009789. The next prime is 2009807. The reversal of 2009804 is 4089002.

It is a self number, because there is not a number n which added to its sum of digits gives 2009804.

It is not an unprimeable number, because it can be changed into a prime (2009807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251222 + ... + 251229.

It is an arithmetic number, because the mean of its divisors is an integer number (586194).

2^2009804 is an apocalyptic number.

It is an amenable number.

2009804 is a deficient number, since it is larger than the sum of its proper divisors (1507360).

2009804 is a wasteful number, since it uses less digits than its factorization.

2009804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502455 (or 502453 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 2009804 is about 1417.6755623202. The cubic root of 2009804 is about 126.1976406088.

The spelling of 2009804 in words is "two million, nine thousand, eight hundred four".