438538313 has 4 divisors (see below), whose sum is σ = 439173648. Its totient is φ = 437902980.

The previous prime is 438538291. The next prime is 438538339. The reversal of 438538313 is 313835834.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 438538313 - 2¹⁰ = 438537289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438538343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316631 + ... + 318012.

It is an arithmetic number, because the mean of its divisors is an integer number (109793412).

Almost surely, 2^438538313 is an apocalyptic number.

It is an amenable number.

438538313 is a deficient number, since it is larger than the sum of its proper divisors (635335).

438538313 is an equidigital number, since it uses as much as digits as its factorization.

438538313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635334.

The product of its digits is 103680, while the sum is 38.

The square root of 438538313 is about 20941.3063823631. The cubic root of 438538313 is about 759.7473265536.

The spelling of 438538313 in words is "four hundred thirty-eight million, five hundred thirty-eight thousand, three hundred thirteen".