2040404 has 6 divisors (see below), whose sum is σ = 3570714. Its totient is φ = 1020200.

The previous prime is 2040403. The next prime is 2040407. The reversal of 2040404 is 4040402.

It can be written as a sum of positive squares in only one way, i.e., 1317904 + 722500 = 1148^2 + 850^2 .

2040404 is a modest number, since divided by 404 gives 204 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2040403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255047 + ... + 255054.

It is an arithmetic number, because the mean of its divisors is an integer number (595119).

2^2040404 is an apocalyptic number.

It is an amenable number.

2040404 is a deficient number, since it is larger than the sum of its proper divisors (1530310).

2040404 is a wasteful number, since it uses less digits than its factorization.

2040404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510105 (or 510103 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 2040404 is about 1428.4271069957. The cubic root of 2040404 is about 126.8348857629.

Adding to 2040404 its reverse (4040402), we get a palindrome (6080806).

The spelling of 2040404 in words is "two million, forty thousand, four hundred four".