438934221 has 20 divisors (see below), whose sum is σ = 715301664. Its totient is φ = 266020200.

The previous prime is 438934213. The next prime is 438934229. The reversal of 438934221 is 122439834.

It is an interprime number because it is at equal distance from previous prime (438934213) and next prime (438934229).

It is not a de Polignac number, because 438934221 - 2³ = 438934213 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438934229) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 245425 + ... + 247206.

Almost surely, 2^438934221 is an apocalyptic number.

It is an amenable number.

438934221 is a deficient number, since it is larger than the sum of its proper divisors (276367443).

438934221 is a wasteful number, since it uses less digits than its factorization.

438934221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492654 (or 492645 counting only the distinct ones).

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

The square root of 438934221 is about 20950.7570507607. The cubic root of 438934221 is about 759.9758885472.

The spelling of 438934221 in words is "four hundred thirty-eight million, nine hundred thirty-four thousand, two hundred twenty-one".