4221328 has 20 divisors (see below), whose sum is σ = 8535168. Its totient is φ = 2018720.

The previous prime is 4221323. The next prime is 4221337. The reversal of 4221328 is 8231224.

It is a super-2 number, since 2×4221328² = 35639220167168, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4221299 and 4221308.

It is not an unprimeable number, because it can be changed into a prime (4221323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5368 + ... + 6103.

Almost surely, 2^4221328 is an apocalyptic number.

It is an amenable number.

4221328 is an abundant number, since it is smaller than the sum of its proper divisors (4313840).

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

4221328 is a wasteful number, since it uses less digits than its factorization.

4221328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11502 (or 11496 counting only the distinct ones).

The product of its digits is 768, while the sum is 22.

The square root of 4221328 is about 2054.5870631346. The cubic root of 4221328 is about 161.6155084290.

The spelling of 4221328 in words is "four million, two hundred twenty-one thousand, three hundred twenty-eight".