3840645 has 16 divisors (see below), whose sum is σ = 6262272. Its totient is φ = 2009280.

The previous prime is 3840601. The next prime is 3840647. The reversal of 3840645 is 5460483.

3840645 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 3840645 - 2¹⁰ = 3839621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3840647) 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, 1621 + ... + 3210.

It is an arithmetic number, because the mean of its divisors is an integer number (391392).

Almost surely, 2^3840645 is an apocalyptic number.

It is an amenable number.

3840645 is a deficient number, since it is larger than the sum of its proper divisors (2421627).

3840645 is a wasteful number, since it uses less digits than its factorization.

3840645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4892.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 3840645 is about 1959.7563624083. The cubic root of 3840645 is about 156.6034728282.

The spelling of 3840645 in words is "three million, eight hundred forty thousand, six hundred forty-five".