3840305 has 16 divisors (see below), whose sum is σ = 5318784. Its totient is φ = 2607360.

The previous prime is 3840301. The next prime is 3840307. The reversal of 3840305 is 5030483.

3840305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3840305 - 2² = 3840301 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3840301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3470 + ... + 4440.

It is an arithmetic number, because the mean of its divisors is an integer number (332424).

Almost surely, 2^3840305 is an apocalyptic number.

3840305 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3840305 is a deficient number, since it is larger than the sum of its proper divisors (1478479).

3840305 is a wasteful number, since it uses less digits than its factorization.

3840305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096.

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

The square root of 3840305 is about 1959.6696150117. The cubic root of 3840305 is about 156.5988514906.

Adding to 3840305 its reverse (5030483), we get a palindrome (8870788).

The spelling of 3840305 in words is "three million, eight hundred forty thousand, three hundred five".