3643964 has 12 divisors (see below), whose sum is σ = 6390384. Its totient is φ = 1818144.

The previous prime is 3643963. The next prime is 3643973. The reversal of 3643964 is 4693463.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3643961) 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, 2897 + ... + 3959.

It is an arithmetic number, because the mean of its divisors is an integer number (532532).

Almost surely, 2^3643964 is an apocalyptic number.

It is an amenable number.

3643964 is a deficient number, since it is larger than the sum of its proper divisors (2746420).

3643964 is a wasteful number, since it uses less digits than its factorization.

3643964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1924 (or 1922 counting only the distinct ones).

The product of its digits is 46656, while the sum is 35.

The square root of 3643964 is about 1908.9169704311. The cubic root of 3643964 is about 153.8832532837.

The spelling of 3643964 in words is "three million, six hundred forty-three thousand, nine hundred sixty-four".