3644963 has 12 divisors (see below), whose sum is σ = 4302360. Its totient is φ = 3078432.

The previous prime is 3644959. The next prime is 3644983. The reversal of 3644963 is 3694463.

It is a happy number.

It is not a de Polignac number, because 3644963 - 2² = 3644959 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3644983) 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 11 ways as a sum of consecutive naturals, for example, 3068 + ... + 4086.

It is an arithmetic number, because the mean of its divisors is an integer number (358530).

Almost surely, 2^3644963 is an apocalyptic number.

3644963 is a deficient number, since it is larger than the sum of its proper divisors (657397).

3644963 is a wasteful number, since it uses less digits than its factorization.

3644963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106 (or 1099 counting only the distinct ones).

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

The square root of 3644963 is about 1909.1786191973. The cubic root of 3644963 is about 153.8973144657.

The spelling of 3644963 in words is "three million, six hundred forty-four thousand, nine hundred sixty-three".