438728441 has 4 divisors (see below), whose sum is σ = 448931472. Its totient is φ = 428525412.

The previous prime is 438728431. The next prime is 438728471. The reversal of 438728441 is 144827834.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 144827834 = 2 ⋅72413917.

It is a cyclic number.

It is not a de Polignac number, because 438728441 - 2¹⁰ = 438727417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (438728431) by changing a digit.

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, 5101451 + ... + 5101536.

It is an arithmetic number, because the mean of its divisors is an integer number (112232868).

Almost surely, 2^438728441 is an apocalyptic number.

It is an amenable number.

438728441 is a deficient number, since it is larger than the sum of its proper divisors (10203031).

438728441 is a wasteful number, since it uses less digits than its factorization.

438728441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10203030.

The product of its digits is 172032, while the sum is 41.

The square root of 438728441 is about 20945.8454353125. The cubic root of 438728441 is about 759.8571066763.

The spelling of 438728441 in words is "four hundred thirty-eight million, seven hundred twenty-eight thousand, four hundred forty-one".