4221938 has 24 divisors (see below), whose sum is σ = 7488432. Its totient is φ = 1779624.

The previous prime is 4221923. The next prime is 4221941. The reversal of 4221938 is 8391224.

It is a self number, because there is not a number n which added to its sum of digits gives 4221938.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6245 + ... + 6887.

It is an arithmetic number, because the mean of its divisors is an integer number (312018).

Almost surely, 2^4221938 is an apocalyptic number.

4221938 is a deficient number, since it is larger than the sum of its proper divisors (3266494).

4221938 is a wasteful number, since it uses less digits than its factorization.

4221938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726 (or 719 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 4221938 is about 2054.7355060932. The cubic root of 4221938 is about 161.6232927654.

The spelling of 4221938 in words is "four million, two hundred twenty-one thousand, nine hundred thirty-eight".