2304309 has 16 divisors (see below), whose sum is σ = 3535488. Its totient is φ = 1307712.

The previous prime is 2304307. The next prime is 2304317. The reversal of 2304309 is 9034032.

It is not a de Polignac number, because 2304309 - 2¹ = 2304307 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2304307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3859 + ... + 4415.

It is an arithmetic number, because the mean of its divisors is an integer number (220968).

2^2304309 is an apocalyptic number.

It is an amenable number.

2304309 is a deficient number, since it is larger than the sum of its proper divisors (1231179).

2304309 is a wasteful number, since it uses less digits than its factorization.

2304309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 2304309 is about 1517.9950592805. The cubic root of 2304309 is about 132.0829941798.

The spelling of 2304309 in words is "two million, three hundred four thousand, three hundred nine".