3920005 has 16 divisors (see below), whose sum is σ = 4976640. Its totient is φ = 2958208.

The previous prime is 3920003. The next prime is 3920011. The reversal of 3920005 is 5000293.

3920005 = T₁₆₆ + T₁₆₇ + ... + T₃₀₃.

3920005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 3920005 - 2¹ = 3920003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3920003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10044 + ... + 10426.

It is an arithmetic number, because the mean of its divisors is an integer number (311040).

Almost surely, 2^3920005 is an apocalyptic number.

It is an amenable number.

3920005 is a deficient number, since it is larger than the sum of its proper divisors (1056635).

3920005 is a wasteful number, since it uses less digits than its factorization.

3920005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 3920005 is about 1979.9002500126. The cubic root of 3920005 is about 157.6747703006.

Adding to 3920005 its reverse (5000293), we get a palindrome (8920298).

It can be divided in two parts, 392000 and 5, that multiplied together give a square (1960000 = 1400²).

The spelling of 3920005 in words is "three million, nine hundred twenty thousand, five".