3645664 has 24 divisors (see below), whose sum is σ = 7830648. Its totient is φ = 1656960.

The previous prime is 3645659. The next prime is 3645683. The reversal of 3645664 is 4665463.

It is a d-powerful number, because it can be written as 3 + 6⁵ + 4⁷ + 5³ + 6⁸ + 6⁸ + 4⁹ .

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, 4827 + ... + 5530.

It is an arithmetic number, because the mean of its divisors is an integer number (326277).

Almost surely, 2^3645664 is an apocalyptic number.

It is an amenable number.

3645664 is an abundant number, since it is smaller than the sum of its proper divisors (4184984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3645664 is a wasteful number, since it uses less digits than its factorization.

3645664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10378 (or 10370 counting only the distinct ones).

The product of its digits is 51840, while the sum is 34.

The square root of 3645664 is about 1909.3621971748. The cubic root of 3645664 is about 153.9071796872.

The spelling of 3645664 in words is "three million, six hundred forty-five thousand, six hundred sixty-four".