3905305 has 8 divisors (see below), whose sum is σ = 4775112. Its totient is φ = 3065088.

The previous prime is 3905299. The next prime is 3905323. The reversal of 3905305 is 5035093.

It can be written as a sum of positive squares in 4 ways, for example, as 1354896 + 2550409 = 1164^2 + 1597^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3905305 - 2⁵ = 3905273 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3905305.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7104 + ... + 7633.

It is an arithmetic number, because the mean of its divisors is an integer number (596889).

Almost surely, 2^3905305 is an apocalyptic number.

It is an amenable number.

3905305 is a deficient number, since it is larger than the sum of its proper divisors (869807).

3905305 is a wasteful number, since it uses less digits than its factorization.

3905305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14795.

The product of its (nonzero) digits is 2025, while the sum is 25.

The square root of 3905305 is about 1976.1844549535. The cubic root of 3905305 is about 157.4774302084.

The spelling of 3905305 in words is "three million, nine hundred five thousand, three hundred five".