438784 has 20 divisors (see below), whose sum is σ = 877734. Its totient is φ = 219136.

The previous prime is 438769. The next prime is 438793. The reversal of 438784 is 487834.

It can be written as a sum of positive squares in only one way, i.e., 278784 + 160000 = 528^2 + 400^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84 + ... + 940.

2⁴³⁸⁷⁸⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 438784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (438867).

438784 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

438784 is an frugal number, since it uses more digits than its factorization.

438784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875 (or 859 counting only the distinct ones).

The product of its digits is 21504, while the sum is 34.

The square root of 438784 is about 662.4077294235. The cubic root of 438784 is about 75.9889180518.

The spelling of 438784 in words is "four hundred thirty-eight thousand, seven hundred eighty-four".