3639365 has 12 divisors (see below), whose sum is σ = 4486692. Its totient is φ = 2833920.

The previous prime is 3639347. The next prime is 3639379. The reversal of 3639365 is 5639363.

It can be written as a sum of positive squares in 6 ways, for example, as 2079364 + 1560001 = 1442^2 + 1249^2 .

It is not a de Polignac number, because 3639365 - 2⁸ = 3639109 is a prime.

It is a d-powerful number, because it can be written as 3² + 6² + 3² + 9 + 3⁸ + 6⁸ + 5⁹ .

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8189 + ... + 8621.

It is an arithmetic number, because the mean of its divisors is an integer number (373891).

Almost surely, 2^3639365 is an apocalyptic number.

It is an amenable number.

3639365 is a deficient number, since it is larger than the sum of its proper divisors (847327).

3639365 is an equidigital number, since it uses as much as digits as its factorization.

3639365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520 (or 479 counting only the distinct ones).

The product of its digits is 43740, while the sum is 35.

The square root of 3639365 is about 1907.7119803576. The cubic root of 3639365 is about 153.8184880060.

It can be divided in two parts, 3639 and 365, that added together give a palindrome (4004).

The spelling of 3639365 in words is "three million, six hundred thirty-nine thousand, three hundred sixty-five".