2604404 has 18 divisors (see below), whose sum is σ = 5010642. Its totient is φ = 1183600.

The previous prime is 2604401. The next prime is 2604431. The reversal of 2604404 is 4044062.

It can be written as a sum of positive squares in only one way, i.e., 2044900 + 559504 = 1430^2 + 748^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2604401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2207 + ... + 3174.

It is an arithmetic number, because the mean of its divisors is an integer number (278369).

2^2604404 is an apocalyptic number.

It is an amenable number.

2604404 is a deficient number, since it is larger than the sum of its proper divisors (2406238).

2604404 is a wasteful number, since it uses less digits than its factorization.

2604404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5407 (or 5394 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 2604404 is about 1613.8165942882. The cubic root of 2604404 is about 137.5844814165.

Adding to 2604404 its reverse (4044062), we get a palindrome (6648466).

It can be divided in two parts, 260 and 4404, that added together give a palindrome (4664).

The spelling of 2604404 in words is "two million, six hundred four thousand, four hundred four".