4021944 has 32 divisors (see below), whose sum is σ = 10158720. Its totient is φ = 1326816.

The previous prime is 4021933. The next prime is 4021949. The reversal of 4021944 is 4491204.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1659 + ... + 3285.

It is an arithmetic number, because the mean of its divisors is an integer number (317460).

Almost surely, 2^4021944 is an apocalyptic number.

It is an amenable number.

4021944 is an abundant number, since it is smaller than the sum of its proper divisors (6136776).

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

4021944 is a wasteful number, since it uses less digits than its factorization.

4021944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739 (or 1735 counting only the distinct ones).

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

The square root of 4021944 is about 2005.4784965190. The cubic root of 4021944 is about 159.0298587174.

It can be divided in two parts, 402 and 1944, that added together give a triangular number (2346 = T₆₈).

The spelling of 4021944 in words is "four million, twenty-one thousand, nine hundred forty-four".