3905838 has 12 divisors (see below), whose sum is σ = 8462688. Its totient is φ = 1301940.

The previous prime is 3905833. The next prime is 3905843. The reversal of 3905838 is 8385093.

It is an interprime number because it is at equal distance from previous prime (3905833) and next prime (3905843).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3905833) 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 5 ways as a sum of consecutive naturals, for example, 108478 + ... + 108513.

It is an arithmetic number, because the mean of its divisors is an integer number (705224).

Almost surely, 2^3905838 is an apocalyptic number.

3905838 is an abundant number, since it is smaller than the sum of its proper divisors (4556850).

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

3905838 is a wasteful number, since it uses less digits than its factorization.

3905838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216999 (or 216996 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 3905838 is about 1976.3193061851. The cubic root of 3905838 is about 157.4845941091.

The spelling of 3905838 in words is "three million, nine hundred five thousand, eight hundred thirty-eight".