4021836 has 96 divisors (see below), whose sum is σ = 12042240. Its totient is φ = 1016064.

The previous prime is 4021777. The next prime is 4021867. The reversal of 4021836 is 6381204.

It is a happy 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 31 ways as a sum of consecutive naturals, for example, 31605 + ... + 31731.

It is an arithmetic number, because the mean of its divisors is an integer number (125440).

Almost surely, 2^4021836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4021836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6021120).

4021836 is an abundant number, since it is smaller than the sum of its proper divisors (8020404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4021836 is a wasteful number, since it uses less digits than its factorization.

4021836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 4021836 is about 2005.4515700959. The cubic root of 4021836 is about 159.0284352451.

The spelling of 4021836 in words is "four million, twenty-one thousand, eight hundred thirty-six".