238783475538 has 12 divisors (see below), whose sum is σ = 517364197038. Its totient is φ = 79594491840.

The previous prime is 238783475519. The next prime is 238783475551. The reversal of 238783475538 is 835574387832.

238783475538 is a `hidden beast` number, since 2 + 3 + 8 + 78 + 3 + 4 + 7 + 553 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 191999083329 + 46784392209 = 438177^2 + 216297^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6632874303 + ... + 6632874338.

Almost surely, 2^238783475538 is an apocalyptic number.

238783475538 is an abundant number, since it is smaller than the sum of its proper divisors (278580721500).

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

238783475538 is a wasteful number, since it uses less digits than its factorization.

238783475538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13265748649 (or 13265748646 counting only the distinct ones).

The product of its digits is 135475200, while the sum is 63.

The spelling of 238783475538 in words is "two hundred thirty-eight billion, seven hundred eighty-three million, four hundred seventy-five thousand, five hundred thirty-eight".