438880565 has 4 divisors (see below), whose sum is σ = 526656684. Its totient is φ = 351104448.

The previous prime is 438880499. The next prime is 438880571. The reversal of 438880565 is 565088834.

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 208022929 + 230857636 = 14423^2 + 15194^2 .

It is a cyclic number.

It is not a de Polignac number, because 438880565 - 2¹⁰ = 438879541 is a prime.

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43888052 + ... + 43888061.

It is an arithmetic number, because the mean of its divisors is an integer number (131664171).

Almost surely, 2^438880565 is an apocalyptic number.

It is an amenable number.

438880565 is a deficient number, since it is larger than the sum of its proper divisors (87776119).

438880565 is an equidigital number, since it uses as much as digits as its factorization.

438880565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87776118.

The product of its (nonzero) digits is 921600, while the sum is 47.

The square root of 438880565 is about 20949.4764851058. The cubic root of 438880565 is about 759.9449204081.

The spelling of 438880565 in words is "four hundred thirty-eight million, eight hundred eighty thousand, five hundred sixty-five".