389666560 has 72 divisors (see below), whose sum is σ = 937460160. Its totient is φ = 155185152.

The previous prime is 389666539. The next prime is 389666561. The reversal of 389666560 is 65666983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389666561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374521 + ... + 375559.

It is an arithmetic number, because the mean of its divisors is an integer number (13020280).

Almost surely, 2^389666560 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 389666560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (468730080).

389666560 is an abundant number, since it is smaller than the sum of its proper divisors (547793600).

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

389666560 is a wasteful number, since it uses less digits than its factorization.

389666560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353 (or 1339 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 49.

The square root of 389666560 is about 19739.9736575305. The cubic root of 389666560 is about 730.4060791902.

The spelling of 389666560 in words is "three hundred eighty-nine million, six hundred sixty-six thousand, five hundred sixty".