844864138 has 16 divisors (see below), whose sum is σ = 1286228160. Its totient is φ = 416150656.

The previous prime is 844864103. The next prime is 844864169. The reversal of 844864138 is 831468448.

844864138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52506 + ... + 66682.

It is an arithmetic number, because the mean of its divisors is an integer number (80389260).

Almost surely, 2^844864138 is an apocalyptic number.

844864138 is a deficient number, since it is larger than the sum of its proper divisors (441364022).

844864138 is a wasteful number, since it uses less digits than its factorization.

844864138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14621.

The product of its digits is 589824, while the sum is 46.

The square root of 844864138 is about 29066.5467161134. The cubic root of 844864138 is about 945.3565232780.

The spelling of 844864138 in words is "eight hundred forty-four million, eight hundred sixty-four thousand, one hundred thirty-eight".