3644215 has 4 divisors (see below), whose sum is σ = 4373064. Its totient is φ = 2915368.

The previous prime is 3644213. The next prime is 3644231. The reversal of 3644215 is 5124463.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3644215 - 2¹ = 3644213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3644215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3644213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364417 + ... + 364426.

It is an arithmetic number, because the mean of its divisors is an integer number (1093266).

Almost surely, 2^3644215 is an apocalyptic number.

3644215 is a deficient number, since it is larger than the sum of its proper divisors (728849).

3644215 is an equidigital number, since it uses as much as digits as its factorization.

3644215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728848.

The product of its digits is 2880, while the sum is 25.

The square root of 3644215 is about 1908.9827133843. The cubic root of 3644215 is about 153.8867864150.

Adding to 3644215 its reverse (5124463), we get a palindrome (8768678).

The spelling of 3644215 in words is "three million, six hundred forty-four thousand, two hundred fifteen".