3639804 has 24 divisors (see below), whose sum is σ = 9706368. Its totient is φ = 1039920.

The previous prime is 3639781. The next prime is 3639817. The reversal of 3639804 is 4089363.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21582 + ... + 21749.

It is an arithmetic number, because the mean of its divisors is an integer number (404432).

Almost surely, 2^3639804 is an apocalyptic number.

It is an amenable number.

3639804 is an abundant number, since it is smaller than the sum of its proper divisors (6066564).

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

3639804 is a wasteful number, since it uses less digits than its factorization.

3639804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43345 (or 43343 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 3639804 is about 1907.8270361854. The cubic root of 3639804 is about 153.8246725648.

The spelling of 3639804 in words is "three million, six hundred thirty-nine thousand, eight hundred four".