438128247 has 16 divisors (see below), whose sum is σ = 598675968. Its totient is φ = 284854080.

The previous prime is 438128237. The next prime is 438128269. The reversal of 438128247 is 742821834.

It is not a de Polignac number, because 438128247 - 2⁴ = 438128231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438128227) 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 15 ways as a sum of consecutive naturals, for example, 95938 + ... + 100400.

It is an arithmetic number, because the mean of its divisors is an integer number (37417248).

Almost surely, 2^438128247 is an apocalyptic number.

438128247 is a deficient number, since it is larger than the sum of its proper divisors (160547721).

438128247 is a wasteful number, since it uses less digits than its factorization.

438128247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5270.

The product of its digits is 86016, while the sum is 39.

The square root of 438128247 is about 20931.5132515545. The cubic root of 438128247 is about 759.5104459171.

The spelling of 438128247 in words is "four hundred thirty-eight million, one hundred twenty-eight thousand, two hundred forty-seven".