2009404 has 12 divisors (see below), whose sum is σ = 3533544. Its totient is φ = 999824.

The previous prime is 2009393. The next prime is 2009407. The reversal of 2009404 is 4049002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2009407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199 + ... + 2014.

It is an arithmetic number, because the mean of its divisors is an integer number (294462).

2^2009404 is an apocalyptic number.

It is an amenable number.

2009404 is a deficient number, since it is larger than the sum of its proper divisors (1524140).

2009404 is a wasteful number, since it uses less digits than its factorization.

2009404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2444 (or 2442 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2009404 is about 1417.5344792985. The cubic root of 2009404 is about 126.1892679175.

It can be divided in two parts, 200 and 9404, that added together give a square (9604 = 98²).

The spelling of 2009404 in words is "two million, nine thousand, four hundred four".