3639864 has 32 divisors (see below), whose sum is σ = 9313920. Its totient is φ = 1184736.

The previous prime is 3639851. The next prime is 3639869. The reversal of 3639864 is 4689363.

3639864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3639869) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 732 + ... + 2795.

It is an arithmetic number, because the mean of its divisors is an integer number (291060).

Almost surely, 2^3639864 is an apocalyptic number.

It is an amenable number.

3639864 is an abundant number, since it is smaller than the sum of its proper divisors (5674056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3639864 is a wasteful number, since it uses less digits than its factorization.

3639864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3579 (or 3575 counting only the distinct ones).

The product of its digits is 93312, while the sum is 39.

The square root of 3639864 is about 1907.8427608165. The cubic root of 3639864 is about 153.8255177962.

The spelling of 3639864 in words is "three million, six hundred thirty-nine thousand, eight hundred sixty-four".