389685760 has 120 divisors (see below), whose sum is σ = 973008036. Its totient is φ = 149667840.

The previous prime is 389685707. The next prime is 389685767. The reversal of 389685760 is 67586983.

It can be written as a sum of positive squares in 6 ways, for example, as 58736896 + 330948864 = 7664^2 + 18192^2 .

It is a junction number, because it is equal to n+sod(n) for n = 389685698 and 389685707.

It is not an unprimeable number, because it can be changed into a prime (389685767) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2152870 + ... + 2153050.

Almost surely, 2^389685760 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 389685760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (486504018).

389685760 is an abundant number, since it is smaller than the sum of its proper divisors (583322276).

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

389685760 is an equidigital number, since it uses as much as digits as its factorization.

389685760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 52.

The square root of 389685760 is about 19740.4599743775. The cubic root of 389685760 is about 730.4180754008.

The spelling of 389685760 in words is "three hundred eighty-nine million, six hundred eighty-five thousand, seven hundred sixty".