844000138 has 12 divisors (see below), whose sum is σ = 1271040498. Its totient is φ = 420326600.

The previous prime is 844000123. The next prime is 844000151. The reversal of 844000138 is 831000448.

844000138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 677925369 + 166074769 = 26037^2 + 12887^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 135288 + ... + 141388.

Almost surely, 2^844000138 is an apocalyptic number.

844000138 is a deficient number, since it is larger than the sum of its proper divisors (427040360).

844000138 is an equidigital number, since it uses as much as digits as its factorization.

844000138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6629 (or 6366 counting only the distinct ones).

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

The square root of 844000138 is about 29051.6804677458. The cubic root of 844000138 is about 945.0341571969.

The spelling of 844000138 in words is "eight hundred forty-four million, one hundred thirty-eight", and thus it is an aban number.