838140 has 48 divisors (see below), whose sum is σ = 2395680. Its totient is φ = 218880.

The previous prime is 838139. The next prime is 838141. The reversal of 838140 is 41838.

It is an interprime number because it is at equal distance from previous prime (838139) and next prime (838141).

It is a self number, because there is not a number n which added to its sum of digits gives 838140.

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 838140.

It is not an unprimeable number, because it can be changed into a prime (838141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3546 + ... + 3774.

It is an arithmetic number, because the mean of its divisors is an integer number (49910).

2⁸³⁸¹⁴⁰ is an apocalyptic number.

It is a pronic number, being equal to 915×916.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 838140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1197840).

838140 is an abundant number, since it is smaller than the sum of its proper divisors (1557540).

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

838140 is a wasteful number, since it uses less digits than its factorization.

838140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 838140 is about 915.4998634626. The cubic root of 838140 is about 94.2841859912.

Adding to 838140 its reverse (41838), we get a palindrome (879978).

The spelling of 838140 in words is "eight hundred thirty-eight thousand, one hundred forty".