3639887 has 16 divisors (see below), whose sum is σ = 4147200. Its totient is φ = 3173760.

The previous prime is 3639869. The next prime is 3639913. The reversal of 3639887 is 7889363.

It is not a de Polignac number, because 3639887 - 2⁸ = 3639631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3639817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18962 + ... + 19152.

It is an arithmetic number, because the mean of its divisors is an integer number (259200).

Almost surely, 2^3639887 is an apocalyptic number.

3639887 is a deficient number, since it is larger than the sum of its proper divisors (507313).

3639887 is a wasteful number, since it uses less digits than its factorization.

3639887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286.

The product of its digits is 217728, while the sum is 44.

The square root of 3639887 is about 1907.8487885574. The cubic root of 3639887 is about 153.8258417991.

The spelling of 3639887 in words is "three million, six hundred thirty-nine thousand, eight hundred eighty-seven".