2804004 has 48 divisors (see below), whose sum is σ = 8310400. Its totient is φ = 800928.

The previous prime is 2803991. The next prime is 2804023. The reversal of 2804004 is 4004082.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1099 + ... + 2610.

2^2804004 is an apocalyptic number.

It is an amenable number.

2804004 is an abundant number, since it is smaller than the sum of its proper divisors (5506396).

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

2804004 is a wasteful number, since it uses less digits than its factorization.

2804004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3729 (or 3721 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 2804004 is about 1674.5160494901. The cubic root of 2804004 is about 141.0131268901.

Adding to 2804004 its reverse (4004082), we get a palindrome (6808086).

The spelling of 2804004 in words is "two million, eight hundred four thousand, four".