438928 has 20 divisors (see below), whose sum is σ = 972160. Its totient is φ = 188064.

The previous prime is 438913. The next prime is 438937. The reversal of 438928 is 829834.

It is a junction number, because it is equal to n+sod(n) for n = 438893 and 438902.

It is an unprimeable number.

438928 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1848 + ... + 2071.

It is an arithmetic number, because the mean of its divisors is an integer number (48608).

2⁴³⁸⁹²⁸ is an apocalyptic number.

It is an amenable number.

438928 is an abundant number, since it is smaller than the sum of its proper divisors (533232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

438928 is a wasteful number, since it uses less digits than its factorization.

438928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3934 (or 3928 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

The square root of 438928 is about 662.5164148910. The cubic root of 438928 is about 75.9972298159.

Subtracting from 438928 its product of digits (13824), we obtain a square (425104 = 652²).

The spelling of 438928 in words is "four hundred thirty-eight thousand, nine hundred twenty-eight".