3638565 has 24 divisors (see below), whose sum is σ = 7208448. Its totient is φ = 1663200.

The previous prime is 3638549. The next prime is 3638573. The reversal of 3638565 is 5658363.

3638565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3638565 - 2⁴ = 3638549 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5461 + ... + 6090.

It is an arithmetic number, because the mean of its divisors is an integer number (300352).

Almost surely, 2^3638565 is an apocalyptic number.

3638565 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3638565 is a deficient number, since it is larger than the sum of its proper divisors (3569883).

3638565 is a wasteful number, since it uses less digits than its factorization.

3638565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11569 (or 11566 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 3638565 is about 1907.5022935766. The cubic root of 3638565 is about 153.8072164602.

The spelling of 3638565 in words is "three million, six hundred thirty-eight thousand, five hundred sixty-five".