389427977871 has 24 divisors (see below), whose sum is σ = 587180659104. Its totient is φ = 248460903360.

The previous prime is 389427977863. The next prime is 389427977891. The reversal of 389427977871 is 178779724983.

389427977871 is a `hidden beast` number, since 38 + 9 + 427 + 97 + 7 + 87 + 1 = 666.

It is not a de Polignac number, because 389427977871 - 2³ = 389427977863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 389427977871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389427977891) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9565371 + ... + 9605996.

It is an arithmetic number, because the mean of its divisors is an integer number (24465860796).

Almost surely, 2^389427977871 is an apocalyptic number.

389427977871 is a deficient number, since it is larger than the sum of its proper divisors (197752681233).

389427977871 is a wasteful number, since it uses less digits than its factorization.

389427977871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19171471 (or 19171468 counting only the distinct ones).

The product of its digits is 298722816, while the sum is 72.

The spelling of 389427977871 in words is "three hundred eighty-nine billion, four hundred twenty-seven million, nine hundred seventy-seven thousand, eight hundred seventy-one".