3855904 has 72 divisors (see below), whose sum is σ = 8854272. Its totient is φ = 1647360.

The previous prime is 3855857. The next prime is 3855913. The reversal of 3855904 is 4095583.

It is a self number, because there is not a number n which added to its sum of digits gives 3855904.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124369 + ... + 124399.

It is an arithmetic number, because the mean of its divisors is an integer number (122976).

Almost surely, 2^3855904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3855904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4427136).

3855904 is an abundant number, since it is smaller than the sum of its proper divisors (4998368).

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

3855904 is a wasteful number, since it uses less digits than its factorization.

3855904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 3855904 is about 1963.6455892039. The cubic root of 3855904 is about 156.8105955633.

The spelling of 3855904 in words is "three million, eight hundred fifty-five thousand, nine hundred four".