389545984 has 40 divisors (see below), whose sum is σ = 780139800. Its totient is φ = 194510848.

The previous prime is 389545979. The next prime is 389545993. The reversal of 389545984 is 489545983.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 523917 + ... + 524659.

It is an arithmetic number, because the mean of its divisors is an integer number (19503495).

Almost surely, 2^389545984 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 389545984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (390069900).

389545984 is an abundant number, since it is smaller than the sum of its proper divisors (390593816).

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

389545984 is an frugal number, since it uses more digits than its factorization.

389545984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781 (or 745 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 55.

The square root of 389545984 is about 19736.9193138139. The cubic root of 389545984 is about 730.3307339781.

Subtracting 389545984 from its reverse (489545983), we obtain a palindrome (99999999).

The spelling of 389545984 in words is "three hundred eighty-nine million, five hundred forty-five thousand, nine hundred eighty-four".