8340305 has 4 divisors (see below), whose sum is σ = 10008372. Its totient is φ = 6672240.

The previous prime is 8340301. The next prime is 8340307. The reversal of 8340305 is 5030438.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5494336 + 2845969 = 2344^2 + 1687^2 .

It is not a de Polignac number, because 8340305 - 2² = 8340301 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8340301) 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, 834026 + ... + 834035.

It is an arithmetic number, because the mean of its divisors is an integer number (2502093).

Almost surely, 2^8340305 is an apocalyptic number.

It is an amenable number.

8340305 is a deficient number, since it is larger than the sum of its proper divisors (1668067).

8340305 is a wasteful number, since it uses less digits than its factorization.

8340305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1668066.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 8340305 is about 2887.9586215872. The cubic root of 8340305 is about 202.7965882066.

The spelling of 8340305 in words is "eight million, three hundred forty thousand, three hundred five".