3640609 has 16 divisors (see below), whose sum is σ = 4526080. Its totient is φ = 2857680.

The previous prime is 3640597. The next prime is 3640633. The reversal of 3640609 is 9060463.

3640609 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 3640609 - 2⁵ = 3640577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3640649) 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, 3682 + ... + 4564.

It is an arithmetic number, because the mean of its divisors is an integer number (282880).

Almost surely, 2^3640609 is an apocalyptic number.

It is an amenable number.

3640609 is a deficient number, since it is larger than the sum of its proper divisors (885471).

3640609 is a wasteful number, since it uses less digits than its factorization.

3640609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 3640609 is about 1908.0379975252. The cubic root of 3640609 is about 153.8360119789.

The spelling of 3640609 in words is "three million, six hundred forty thousand, six hundred nine".