3648644 has 24 divisors (see below), whose sum is σ = 6655320. Its totient is φ = 1748736.

The previous prime is 3648643. The next prime is 3648647. The reversal of 3648644 is 4468463.

It is a happy number.

3648644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 270400 + 3378244 = 520^2 + 1838^2 .

It is not an unprimeable number, because it can be changed into a prime (3648643) 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 7 ways as a sum of consecutive naturals, for example, 13034 + ... + 13310.

It is an arithmetic number, because the mean of its divisors is an integer number (277305).

Almost surely, 2^3648644 is an apocalyptic number.

It is an amenable number.

3648644 is a deficient number, since it is larger than the sum of its proper divisors (3006676).

3648644 is a wasteful number, since it uses less digits than its factorization.

3648644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407 (or 405 counting only the distinct ones).

The product of its digits is 55296, while the sum is 35.

The square root of 3648644 is about 1910.1424030684. The cubic root of 3648644 is about 153.9491033245.

The spelling of 3648644 in words is "three million, six hundred forty-eight thousand, six hundred forty-four".