844138 has 4 divisors (see below), whose sum is σ = 1266210. Its totient is φ = 422068.

The previous prime is 844127. The next prime is 844139. The reversal of 844138 is 831448.

844138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 840889 + 3249 = 917^2 + 57^2 .

It is not an unprimeable number, because it can be changed into a prime (844139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211033 + ... + 211036.

2⁸⁴⁴¹³⁸ is an apocalyptic number.

844138 is a deficient number, since it is larger than the sum of its proper divisors (422072).

844138 is a wasteful number, since it uses less digits than its factorization.

844138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422071.

The product of its digits is 3072, while the sum is 28.

The square root of 844138 is about 918.7698297180. The cubic root of 844138 is about 94.5085609482.

The spelling of 844138 in words is "eight hundred forty-four thousand, one hundred thirty-eight".