838144138 has 64 divisors (see below), whose sum is σ = 1455874560. Its totient is φ = 359073792.

The previous prime is 838144129. The next prime is 838144159. The reversal of 838144138 is 831441838.

It is a self number, because there is not a number n which added to its sum of digits gives 838144138.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2374170 + ... + 2374522.

It is an arithmetic number, because the mean of its divisors is an integer number (22748040).

Almost surely, 2^838144138 is an apocalyptic number.

838144138 is a deficient number, since it is larger than the sum of its proper divisors (617730422).

838144138 is a wasteful number, since it uses less digits than its factorization.

838144138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511.

The product of its digits is 73728, while the sum is 40.

The square root of 838144138 is about 28950.7191275105. The cubic root of 838144138 is about 942.8434115517.

The spelling of 838144138 in words is "eight hundred thirty-eight million, one hundred forty-four thousand, one hundred thirty-eight".