838218644660 has 24 divisors (see below), whose sum is σ = 1763934036480. Its totient is φ = 334587480224.

The previous prime is 838218644639. The next prime is 838218644701. The reversal of 838218644660 is 66446812838.

It is a super-2 number, since 2×838218644660² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 838218644596 and 838218644605.

It is a congruent number.

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, 43738784 + ... + 43757943.

It is an arithmetic number, because the mean of its divisors is an integer number (73497251520).

Almost surely, 2^838218644660 is an apocalyptic number.

It is an amenable number.

838218644660 is an abundant number, since it is smaller than the sum of its proper divisors (925715391820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

838218644660 is a wasteful number, since it uses less digits than its factorization.

838218644660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87497215 (or 87497213 counting only the distinct ones).

The product of its (nonzero) digits is 10616832, while the sum is 56.

The spelling of 838218644660 in words is "eight hundred thirty-eight billion, two hundred eighteen million, six hundred forty-four thousand, six hundred sixty".