2804005 has 8 divisors (see below), whose sum is σ = 3375000. Its totient is φ = 2236416.

The previous prime is 2803991. The next prime is 2804023. The reversal of 2804005 is 5004082.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 298116 + 2505889 = 546^2 + 1583^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2804005 - 2⁷ = 2803877 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1621 + ... + 2869.

It is an arithmetic number, because the mean of its divisors is an integer number (421875).

2^2804005 is an apocalyptic number.

It is an amenable number.

2804005 is a deficient number, since it is larger than the sum of its proper divisors (570995).

2804005 is a wasteful number, since it uses less digits than its factorization.

2804005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 2804005 is about 1674.5163480838. The cubic root of 2804005 is about 141.0131436534.

Adding to 2804005 its reverse (5004082), we get a palindrome (7808087).

The spelling of 2804005 in words is "two million, eight hundred four thousand, five".