238685823279 has 20 divisors (see below), whose sum is σ = 357402341560. Its totient is φ = 158745893040.

The previous prime is 238685823263. The next prime is 238685823283. The reversal of 238685823279 is 972328586832.

238685823279 is a `hidden beast` number, since 2 + 386 + 85 + 82 + 32 + 79 = 666.

238685823279 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 238685823279 - 2⁴ = 238685823263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238685823209) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 3465589 + ... + 3533790.

It is an arithmetic number, because the mean of its divisors is an integer number (17870117078).

Almost surely, 2^238685823279 is an apocalyptic number.

238685823279 is a deficient number, since it is larger than the sum of its proper divisors (118716518281).

238685823279 is an equidigital number, since it uses as much as digits as its factorization.

238685823279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6999812 (or 6999803 counting only the distinct ones).

The product of its digits is 69672960, while the sum is 63.

The spelling of 238685823279 in words is "two hundred thirty-eight billion, six hundred eighty-five million, eight hundred twenty-three thousand, two hundred seventy-nine".