4221838 has 16 divisors (see below), whose sum is σ = 6708240. Its totient is φ = 1987200.

The previous prime is 4221829. The next prime is 4221851. The reversal of 4221838 is 8381224.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8928 + ... + 9388.

It is an arithmetic number, because the mean of its divisors is an integer number (419265).

Almost surely, 2^4221838 is an apocalyptic number.

4221838 is a deficient number, since it is larger than the sum of its proper divisors (2486402).

4221838 is a wasteful number, since it uses less digits than its factorization.

4221838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723.

The product of its digits is 3072, while the sum is 28.

The square root of 4221838 is about 2054.7111719169. The cubic root of 4221838 is about 161.6220166960.

The spelling of 4221838 in words is "four million, two hundred twenty-one thousand, eight hundred thirty-eight".