438943221 has 12 divisors (see below), whose sum is σ = 634308480. Its totient is φ = 292499880.

The previous prime is 438943177. The next prime is 438943237. The reversal of 438943221 is 122349834.

It is not a de Polignac number, because 438943221 - 2⁶ = 438943157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438942221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13756 + ... + 32666.

It is an arithmetic number, because the mean of its divisors is an integer number (52859040).

Almost surely, 2^438943221 is an apocalyptic number.

It is an amenable number.

438943221 is a deficient number, since it is larger than the sum of its proper divisors (195365259).

438943221 is a wasteful number, since it uses less digits than its factorization.

438943221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21496 (or 21493 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 438943221 is about 20950.9718390341. The cubic root of 438943221 is about 759.9810827470.

The spelling of 438943221 in words is "four hundred thirty-eight million, nine hundred forty-three thousand, two hundred twenty-one".