3644565 has 8 divisors (see below), whose sum is σ = 5831328. Its totient is φ = 1943760.

The previous prime is 3644513. The next prime is 3644569. The reversal of 3644565 is 5654463.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3644565 - 2⁷ = 3644437 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 3¹³ + 6⁴ + 4² + 4⁷ + 5⁷ + 6⁴ + 5⁹ .

3644565 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3644569) 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 7 ways as a sum of consecutive naturals, for example, 121471 + ... + 121500.

It is an arithmetic number, because the mean of its divisors is an integer number (728916).

Almost surely, 2^3644565 is an apocalyptic number.

It is an amenable number.

3644565 is a deficient number, since it is larger than the sum of its proper divisors (2186763).

3644565 is a wasteful number, since it uses less digits than its factorization.

3644565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242979.

The product of its digits is 43200, while the sum is 33.

The square root of 3644565 is about 1909.0743830454. The cubic root of 3644565 is about 153.8917128212.

The spelling of 3644565 in words is "three million, six hundred forty-four thousand, five hundred sixty-five".