438728 has 16 divisors (see below), whose sum is σ = 829980. Its totient is φ = 217408.

The previous prime is 438721. The next prime is 438733. The reversal of 438728 is 827834.

It can be written as a sum of positive squares in 2 ways, for example, as 438244 + 484 = 662^2 + 22^2 .

It is a junction number, because it is equal to n+sod(n) for n = 438694 and 438703.

It is not an unprimeable number, because it can be changed into a prime (438721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1226 + ... + 1542.

2⁴³⁸⁷²⁸ is an apocalyptic number.

It is an amenable number.

438728 is a deficient number, since it is larger than the sum of its proper divisors (391252).

438728 is a wasteful number, since it uses less digits than its factorization.

438728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496 (or 492 counting only the distinct ones).

The product of its digits is 10752, while the sum is 32.

The square root of 438728 is about 662.3654580366. The cubic root of 438728 is about 75.9856852079.

The spelling of 438728 in words is "four hundred thirty-eight thousand, seven hundred twenty-eight".