3640365 has 12 divisors (see below), whose sum is σ = 6310044. Its totient is φ = 1941504.

The previous prime is 3640333. The next prime is 3640369. The reversal of 3640365 is 5630463.

It can be written as a sum of positive squares in 2 ways, for example, as 2414916 + 1225449 = 1554^2 + 1107^2 .

It is not a de Polignac number, because 3640365 - 2⁵ = 3640333 is a prime.

It is a d-powerful number, because it can be written as 3 + 6² + 4⁵ + 0 + 3⁸ + 6⁸ + 5⁹ .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640369) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40404 + ... + 40493.

It is an arithmetic number, because the mean of its divisors is an integer number (525837).

Almost surely, 2^3640365 is an apocalyptic number.

It is an amenable number.

3640365 is a deficient number, since it is larger than the sum of its proper divisors (2669679).

3640365 is a wasteful number, since it uses less digits than its factorization.

3640365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80908 (or 80905 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 3640365 is about 1907.9740564274. The cubic root of 3640365 is about 153.8325751157.

It can be divided in two parts, 3640 and 365, that added together give a triangular number (4005 = T₈₉).

The spelling of 3640365 in words is "three million, six hundred forty thousand, three hundred sixty-five".