2404309 has 4 divisors (see below), whose sum is σ = 2445120. Its totient is φ = 2363500.

The previous prime is 2404291. The next prime is 2404313. The reversal of 2404309 is 9034042.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2404309 - 2¹¹ = 2402261 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2404309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2404349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20317 + ... + 20434.

It is an arithmetic number, because the mean of its divisors is an integer number (611280).

2^2404309 is an apocalyptic number.

It is an amenable number.

2404309 is a deficient number, since it is larger than the sum of its proper divisors (40811).

2404309 is an equidigital number, since it uses as much as digits as its factorization.

2404309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40810.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 2404309 is about 1550.5834385805. The cubic root of 2404309 is about 133.9666695152.

The spelling of 2404309 in words is "two million, four hundred four thousand, three hundred nine".