389646380928 has 128 divisors (see below), whose sum is σ = 1189049610240. Its totient is φ = 110744524800.

The previous prime is 389646380927. The next prime is 389646380969. The reversal of 389646380928 is 829083646983.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389646380923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133938 + ... + 892878.

It is an arithmetic number, because the mean of its divisors is an integer number (9289450080).

Almost surely, 2^389646380928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389646380928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (594524805120).

389646380928 is an abundant number, since it is smaller than the sum of its proper divisors (799403229312).

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

389646380928 is a wasteful number, since it uses less digits than its factorization.

389646380928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759156 (or 759144 counting only the distinct ones).

The product of its (nonzero) digits is 107495424, while the sum is 66.

The spelling of 389646380928 in words is "three hundred eighty-nine billion, six hundred forty-six million, three hundred eighty thousand, nine hundred twenty-eight".