438140 has 24 divisors (see below), whose sum is σ = 969360. Its totient is φ = 165888.

The previous prime is 438133. The next prime is 438143. The reversal of 438140 is 41834.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 438140.

It is not an unprimeable number, because it can be changed into a prime (438143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197 + ... + 956.

It is an arithmetic number, because the mean of its divisors is an integer number (40390).

2⁴³⁸¹⁴⁰ is an apocalyptic number.

It is an amenable number.

438140 is an abundant number, since it is smaller than the sum of its proper divisors (531220).

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

438140 is a wasteful number, since it uses less digits than its factorization.

438140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181 (or 1179 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 438140 is about 661.9214454903. The cubic root of 438140 is about 75.9517237267.

Adding to 438140 its reverse (41834), we get a palindrome (479974).

The spelling of 438140 in words is "four hundred thirty-eight thousand, one hundred forty".