3903985 has 16 divisors (see below), whose sum is σ = 4907520. Its totient is φ = 2977920.

The previous prime is 3903973. The next prime is 3904001. The reversal of 3903985 is 5893093.

It is not a de Polignac number, because 3903985 - 2⁷ = 3903857 is a prime.

3903985 is a lucky number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 13654 + ... + 13936.

It is an arithmetic number, because the mean of its divisors is an integer number (306720).

Almost surely, 2^3903985 is an apocalyptic number.

It is an amenable number.

3903985 is a deficient number, since it is larger than the sum of its proper divisors (1003535).

3903985 is a wasteful number, since it uses less digits than its factorization.

3903985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 3903985 is about 1975.8504498064. The cubic root of 3903985 is about 157.4596856590.

The spelling of 3903985 in words is "three million, nine hundred three thousand, nine hundred eighty-five".