438028 has 6 divisors (see below), whose sum is σ = 766556. Its totient is φ = 219012.

The previous prime is 438017. The next prime is 438029. The reversal of 438028 is 820834.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 437993 and 438011.

It is not an unprimeable number, because it can be changed into a prime (438029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54750 + ... + 54757.

2⁴³⁸⁰²⁸ is an apocalyptic number.

It is an amenable number.

438028 is a deficient number, since it is larger than the sum of its proper divisors (328528).

438028 is a wasteful number, since it uses less digits than its factorization.

438028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109511 (or 109509 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 438028 is about 661.8368378989. The cubic root of 438028 is about 75.9452514286.

The spelling of 438028 in words is "four hundred thirty-eight thousand, twenty-eight".