2609904 has 40 divisors (see below), whose sum is σ = 7356672. Its totient is φ = 790720.

The previous prime is 2609903. The next prime is 2609911. The reversal of 2609904 is 4099062.

It is a super-3 number, since 3×2609904³ = 53332857562081185792, which contains 333 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2609903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1944 + ... + 2999.

2^2609904 is an apocalyptic number.

2609904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2609904 is an abundant number, since it is smaller than the sum of its proper divisors (4746768).

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

2609904 is a wasteful number, since it uses less digits than its factorization.

2609904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4965 (or 4959 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 2609904 is about 1615.5197306130. The cubic root of 2609904 is about 137.6812639680.

It can be divided in two parts, 2 and 609904, that added together give a palindrome (609906).

The spelling of 2609904 in words is "two million, six hundred nine thousand, nine hundred four".