389581916868 has 48 divisors (see below), whose sum is σ = 1010065056000. Its totient is φ = 129855770784.

The previous prime is 389581916849. The next prime is 389581916917. The reversal of 389581916868 is 868619185983.

389581916868 is a `hidden beast` number, since 38 + 9 + 581 + 9 + 1 + 6 + 8 + 6 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 389581916796 and 389581916805.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3899038 + ... + 3997706.

It is an arithmetic number, because the mean of its divisors is an integer number (21043022000).

Almost surely, 2^389581916868 is an apocalyptic number.

It is an amenable number.

389581916868 is an abundant number, since it is smaller than the sum of its proper divisors (620483139132).

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

389581916868 is a wasteful number, since it uses less digits than its factorization.

389581916868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135241 (or 135233 counting only the distinct ones).

The product of its digits is 179159040, while the sum is 72.

It can be divided in two parts, 389581 and 916868, that added together give a square (1306449 = 1143²).

The spelling of 389581916868 in words is "three hundred eighty-nine billion, five hundred eighty-one million, nine hundred sixteen thousand, eight hundred sixty-eight".