238704977871 has 96 divisors (see below), whose sum is σ = 366095987712. Its totient is φ = 149715371520.

The previous prime is 238704977843. The next prime is 238704977881. The reversal of 238704977871 is 178779407832.

238704977871 is a `hidden beast` number, since 2 + 3 + 8 + 7 + 0 + 497 + 78 + 71 = 666.

It is not a de Polignac number, because 238704977871 - 2⁵ = 238704977839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 238704977799 and 238704977808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238704977881) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 328342110 + ... + 328342836.

It is an arithmetic number, because the mean of its divisors is an integer number (3813499872).

Almost surely, 2^238704977871 is an apocalyptic number.

238704977871 is a deficient number, since it is larger than the sum of its proper divisors (127391009841).

238704977871 is a wasteful number, since it uses less digits than its factorization.

238704977871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093 (or 1090 counting only the distinct ones).

The product of its (nonzero) digits is 33191424, while the sum is 63.

The spelling of 238704977871 in words is "two hundred thirty-eight billion, seven hundred four million, nine hundred seventy-seven thousand, eight hundred seventy-one".