4021936 has 20 divisors (see below), whose sum is σ = 7983864. Its totient is φ = 1961600.

The previous prime is 4021933. The next prime is 4021949. The reversal of 4021936 is 6391204.

It is a self number, because there is not a number n which added to its sum of digits gives 4021936.

It is not an unprimeable number, because it can be changed into a prime (4021933) 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 3 ways as a sum of consecutive naturals, for example, 2410 + ... + 3721.

Almost surely, 2^4021936 is an apocalyptic number.

It is an amenable number.

4021936 is a deficient number, since it is larger than the sum of its proper divisors (3961928).

4021936 is a wasteful number, since it uses less digits than its factorization.

4021936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6180 (or 6174 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 4021936 is about 2005.4765019815. The cubic root of 4021936 is about 159.0297532759.

The spelling of 4021936 in words is "four million, twenty-one thousand, nine hundred thirty-six".