438893221 has 8 divisors (see below), whose sum is σ = 488953080. Its totient is φ = 391161792.

The previous prime is 438893219. The next prime is 438893251. The reversal of 438893221 is 122398834.

It can be written as a sum of positive squares in 4 ways, for example, as 44076321 + 394816900 = 6639^2 + 19870^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 438893221 - 2¹ = 438893219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438893251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 581710 + ... + 582463.

It is an arithmetic number, because the mean of its divisors is an integer number (61119135).

Almost surely, 2^438893221 is an apocalyptic number.

It is an amenable number.

438893221 is a deficient number, since it is larger than the sum of its proper divisors (50059859).

438893221 is a wasteful number, since it uses less digits than its factorization.

438893221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164215.

The product of its digits is 82944, while the sum is 40.

The square root of 438893221 is about 20949.7785429823. The cubic root of 438893221 is about 759.9522251825.

The spelling of 438893221 in words is "four hundred thirty-eight million, eight hundred ninety-three thousand, two hundred twenty-one".