389873686920 has 128 divisors (see below), whose sum is σ = 1184435965440. Its totient is φ = 102654443520.

The previous prime is 389873686843. The next prime is 389873686967. The reversal of 389873686920 is 29686378983.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4977984 + ... + 5055696.

It is an arithmetic number, because the mean of its divisors is an integer number (9253405980).

Almost surely, 2^389873686920 is an apocalyptic number.

389873686920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389873686920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (592217982720).

389873686920 is an abundant number, since it is smaller than the sum of its proper divisors (794562278520).

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

389873686920 is a wasteful number, since it uses less digits than its factorization.

389873686920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78255 (or 78251 counting only the distinct ones).

The product of its (nonzero) digits is 188116992, while the sum is 69.

The spelling of 389873686920 in words is "three hundred eighty-nine billion, eight hundred seventy-three million, six hundred eighty-six thousand, nine hundred twenty".