3659644 has 12 divisors (see below), whose sum is σ = 6553624. Its totient is φ = 1787184.

The previous prime is 3659629. The next prime is 3659651. The reversal of 3659644 is 4469563.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10467 + ... + 10810.

Almost surely, 2^3659644 is an apocalyptic number.

It is an amenable number.

3659644 is a deficient number, since it is larger than the sum of its proper divisors (2893980).

3659644 is a wasteful number, since it uses less digits than its factorization.

3659644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21324 (or 21322 counting only the distinct ones).

The product of its digits is 77760, while the sum is 37.

The square root of 3659644 is about 1913.0196026178. The cubic root of 3659644 is about 154.1036576536.

The spelling of 3659644 in words is "three million, six hundred fifty-nine thousand, six hundred forty-four".