3656564 has 12 divisors (see below), whose sum is σ = 6775524. Its totient is φ = 1720704.

The previous prime is 3656561. The next prime is 3656573. The reversal of 3656564 is 4656563.

It can be written as a sum of positive squares in 2 ways, for example, as 2696164 + 960400 = 1642^2 + 980^2 .

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3656561) 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, 26819 + ... + 26954.

It is an arithmetic number, because the mean of its divisors is an integer number (564627).

Almost surely, 2^3656564 is an apocalyptic number.

3656564 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

3656564 is a deficient number, since it is larger than the sum of its proper divisors (3118960).

3656564 is a wasteful number, since it uses less digits than its factorization.

3656564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53794 (or 53792 counting only the distinct ones).

The product of its digits is 64800, while the sum is 35.

The square root of 3656564 is about 1912.2144231231. The cubic root of 3656564 is about 154.0604136949.

Subtracting 3656564 from its reverse (4656563), we obtain a palindrome (999999).

The spelling of 3656564 in words is "three million, six hundred fifty-six thousand, five hundred sixty-four".