839936639938 has 16 divisors (see below), whose sum is σ = 1374455848320. Its totient is φ = 381785472400.

The previous prime is 839936639909. The next prime is 839936639947.

839936639938 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×839936639938² (a number of 25 digits) contains 22 as substring.

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, 4080228 + ... + 4281136.

It is an arithmetic number, because the mean of its divisors is an integer number (85903490520).

Almost surely, 2^839936639938 is an apocalyptic number.

839936639938 is a deficient number, since it is larger than the sum of its proper divisors (534519208382).

839936639938 is a wasteful number, since it uses less digits than its factorization.

839936639938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390953.

The product of its digits is 1224440064, while the sum is 76.

The spelling of 839936639938 in words is "eight hundred thirty-nine billion, nine hundred thirty-six million, six hundred thirty-nine thousand, nine hundred thirty-eight".