3905506 has 16 divisors (see below), whose sum is σ = 6451488. Its totient is φ = 1758400.

The previous prime is 3905501. The next prime is 3905513. The reversal of 3905506 is 6055093.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (3905501) 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, 1701 + ... + 3271.

It is an arithmetic number, because the mean of its divisors is an integer number (403218).

Almost surely, 2^3905506 is an apocalyptic number.

3905506 is a deficient number, since it is larger than the sum of its proper divisors (2545982).

3905506 is a wasteful number, since it uses less digits than its factorization.

3905506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1697.

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 3905506 is about 1976.2353098758. The cubic root of 3905506 is about 157.4801318685.

It can be divided in two parts, 3 and 905506, that added together give a palindrome (905509).

The spelling of 3905506 in words is "three million, nine hundred five thousand, five hundred six".