438939005 has 4 divisors (see below), whose sum is σ = 526726812. Its totient is φ = 351151200.

The previous prime is 438938977. The next prime is 438939037. The reversal of 438939005 is 500939834.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500939834 = 2 ⋅250469917.

It can be written as a sum of positive squares in 2 ways, for example, as 47927929 + 391011076 = 6923^2 + 19774^2 .

It is not a de Polignac number, because 438939005 - 2¹⁴ = 438922621 is a prime.

It is a super-2 number, since 2×438939005² = 385334900220780050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43893896 + ... + 43893905.

It is an arithmetic number, because the mean of its divisors is an integer number (131681703).

Almost surely, 2^438939005 is an apocalyptic number.

It is an amenable number.

438939005 is a deficient number, since it is larger than the sum of its proper divisors (87787807).

438939005 is an equidigital number, since it uses as much as digits as its factorization.

438939005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87787806.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 438939005 is about 20950.8712229349. The cubic root of 438939005 is about 759.9786495618.

The spelling of 438939005 in words is "four hundred thirty-eight million, nine hundred thirty-nine thousand, five".