838138638670 has 16 divisors (see below), whose sum is σ = 1588052157840. Its totient is φ = 317610431424.

The previous prime is 838138638641. The next prime is 838138638683. The reversal of 838138638670 is 76836831838.

It is a junction number, because it is equal to n+sod(n) for n = 838138638599 and 838138638608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2205627807 + ... + 2205628186.

It is an arithmetic number, because the mean of its divisors is an integer number (99253259865).

Almost surely, 2^838138638670 is an apocalyptic number.

838138638670 is a deficient number, since it is larger than the sum of its proper divisors (749913519170).

838138638670 is a wasteful number, since it uses less digits than its factorization.

838138638670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4411256019.

The product of its (nonzero) digits is 27869184, while the sum is 61.

The spelling of 838138638670 in words is "eight hundred thirty-eight billion, one hundred thirty-eight million, six hundred thirty-eight thousand, six hundred seventy".