3900885 has 16 divisors (see below), whose sum is σ = 6443520. Its totient is φ = 2013120.

The previous prime is 3900881. The next prime is 3900887. The reversal of 3900885 is 5880093.

It is not a de Polignac number, because 3900885 - 2² = 3900881 is a prime.

3900885 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3900881) 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 15 ways as a sum of consecutive naturals, for example, 3730 + ... + 4659.

It is an arithmetic number, because the mean of its divisors is an integer number (402720).

Almost surely, 2^3900885 is an apocalyptic number.

It is an amenable number.

3900885 is a deficient number, since it is larger than the sum of its proper divisors (2542635).

3900885 is a wasteful number, since it uses less digits than its factorization.

3900885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8428.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 3900885 is about 1975.0658216880. The cubic root of 3900885 is about 157.4179971209.

It can be divided in two parts, 390088 and 5, that added together give a palindrome (390093).

The spelling of 3900885 in words is "three million, nine hundred thousand, eight hundred eighty-five".