438464321 has 4 divisors (see below), whose sum is σ = 438802644. Its totient is φ = 438126000.

The previous prime is 438464309. The next prime is 438464329. The reversal of 438464321 is 123464834.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 190096 + 438274225 = 436^2 + 20935^2 .

It is a cyclic number.

It is not a de Polignac number, because 438464321 - 2¹⁰ = 438463297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438464329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167210 + ... + 169811.

It is an arithmetic number, because the mean of its divisors is an integer number (109700661).

Almost surely, 2^438464321 is an apocalyptic number.

It is an amenable number.

438464321 is a deficient number, since it is larger than the sum of its proper divisors (338323).

438464321 is a wasteful number, since it uses less digits than its factorization.

438464321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338322.

The product of its digits is 55296, while the sum is 35.

The square root of 438464321 is about 20939.5396558759. The cubic root of 438464321 is about 759.7045949120.

The spelling of 438464321 in words is "four hundred thirty-eight million, four hundred sixty-four thousand, three hundred twenty-one".