3639868 has 24 divisors (see below), whose sum is σ = 6854400. Its totient is φ = 1685808.

The previous prime is 3639851. The next prime is 3639869. The reversal of 3639868 is 8689363.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3063 + ... + 4081.

It is an arithmetic number, because the mean of its divisors is an integer number (285600).

Almost surely, 2^3639868 is an apocalyptic number.

3639868 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

3639868 is a deficient number, since it is larger than the sum of its proper divisors (3214532).

3639868 is a wasteful number, since it uses less digits than its factorization.

3639868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089 (or 1087 counting only the distinct ones).

The product of its digits is 186624, while the sum is 43.

The square root of 3639868 is about 1907.8438091207. The cubic root of 3639868 is about 153.8255741447.

The spelling of 3639868 in words is "three million, six hundred thirty-nine thousand, eight hundred sixty-eight".