438644 has 6 divisors (see below), whose sum is σ = 767634. Its totient is φ = 219320.

The previous prime is 438637. The next prime is 438661. The reversal of 438644 is 446834.

438644 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 438244 + 400 = 662^2 + 20^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54827 + ... + 54834.

It is an arithmetic number, because the mean of its divisors is an integer number (127939).

2⁴³⁸⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

438644 is a deficient number, since it is larger than the sum of its proper divisors (328990).

438644 is a wasteful number, since it uses less digits than its factorization.

438644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109665 (or 109663 counting only the distinct ones).

The product of its digits is 9216, while the sum is 29.

The square root of 438644 is about 662.3020458975. The cubic root of 438644 is about 75.9808354263.

The spelling of 438644 in words is "four hundred thirty-eight thousand, six hundred forty-four".