438128611 has 8 divisors (see below), whose sum is σ = 459014144. Its totient is φ = 417665160.

The previous prime is 438128609. The next prime is 438128617. The reversal of 438128611 is 116821834.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 438128611 - 2¹ = 438128609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438128617) 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 7 ways as a sum of consecutive naturals, for example, 103395 + ... + 107548.

It is an arithmetic number, because the mean of its divisors is an integer number (57376768).

Almost surely, 2^438128611 is an apocalyptic number.

438128611 is a deficient number, since it is larger than the sum of its proper divisors (20885533).

438128611 is a wasteful number, since it uses less digits than its factorization.

438128611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211041.

The product of its digits is 9216, while the sum is 34.

The square root of 438128611 is about 20931.5219465762. The cubic root of 438128611 is about 759.5106562526.

The spelling of 438128611 in words is "four hundred thirty-eight million, one hundred twenty-eight thousand, six hundred eleven".