3905990 has 16 divisors (see below), whose sum is σ = 7670160. Its totient is φ = 1420320.

The previous prime is 3905987. The next prime is 3905999. The reversal of 3905990 is 995093.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3905990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3905999) 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 7 ways as a sum of consecutive naturals, for example, 17645 + ... + 17864.

It is an arithmetic number, because the mean of its divisors is an integer number (479385).

Almost surely, 2^3905990 is an apocalyptic number.

3905990 is a deficient number, since it is larger than the sum of its proper divisors (3764170).

3905990 is a wasteful number, since it uses less digits than its factorization.

3905990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35527.

The product of its (nonzero) digits is 10935, while the sum is 35.

The square root of 3905990 is about 1976.3577611354. The cubic root of 3905990 is about 157.4866369783.

The spelling of 3905990 in words is "three million, nine hundred five thousand, nine hundred ninety".