438740 has 12 divisors (see below), whose sum is σ = 921396. Its totient is φ = 175488.

The previous prime is 438733. The next prime is 438761. The reversal of 438740 is 47834.

It can be written as a sum of positive squares in 2 ways, for example, as 111556 + 327184 = 334^2 + 572^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10949 + ... + 10988.

It is an arithmetic number, because the mean of its divisors is an integer number (76783).

2⁴³⁸⁷⁴⁰ is an apocalyptic number.

It is an amenable number.

438740 is an abundant number, since it is smaller than the sum of its proper divisors (482656).

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

438740 is a wasteful number, since it uses less digits than its factorization.

438740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21946 (or 21944 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 438740 is about 662.3745164180. The cubic root of 438740 is about 75.9863779833.

The spelling of 438740 in words is "four hundred thirty-eight thousand, seven hundred forty".