40340305 has 8 divisors (see below), whose sum is σ = 50077800. Its totient is φ = 31159296.

The previous prime is 40340297. The next prime is 40340317. The reversal of 40340305 is 50304304.

40340305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1115136 + 39225169 = 1056^2 + 6263^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40340305 - 2³ = 40340297 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 138960 + ... + 139249.

It is an arithmetic number, because the mean of its divisors is an integer number (6259725).

Almost surely, 2^40340305 is an apocalyptic number.

It is an amenable number.

40340305 is a deficient number, since it is larger than the sum of its proper divisors (9737495).

40340305 is a wasteful number, since it uses less digits than its factorization.

40340305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278243.

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 40340305 is about 6351.4018137731. The cubic root of 40340305 is about 342.9623074800.

Adding to 40340305 its reverse (50304304), we get a palindrome (90644609).

The spelling of 40340305 in words is "forty million, three hundred forty thousand, three hundred five".