838011681 has 18 divisors (see below), whose sum is σ = 1310738598. Its totient is φ = 515698560.

The previous prime is 838011677. The next prime is 838011683. The reversal of 838011681 is 186110838.

It can be written as a sum of positive squares in 3 ways, for example, as 100400400 + 737611281 = 10020^2 + 27159^2 .

It is not a de Polignac number, because 838011681 - 2² = 838011677 is a prime.

It is a super-2 number, since 2×838011681² = 1404527154984891522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (838011683) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 273960 + ... + 277001.

It is an arithmetic number, because the mean of its divisors is an integer number (72818811).

Almost surely, 2^838011681 is an apocalyptic number.

It is an amenable number.

838011681 is a deficient number, since it is larger than the sum of its proper divisors (472726917).

838011681 is a wasteful number, since it uses less digits than its factorization.

838011681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550993 (or 550977 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 838011681 is about 28948.4314082819. The cubic root of 838011681 is about 942.7937411814.

The spelling of 838011681 in words is "eight hundred thirty-eight million, eleven thousand, six hundred eighty-one".