389603581920 has 864 divisors, whose sum is σ = 1699284787200. Its totient is φ = 79391342592.

The previous prime is 389603581909. The next prime is 389603581957. The reversal of 389603581920 is 29185306983.

389603581920 is a `hidden beast` number, since 3 + 8 + 9 + 603 + 5 + 8 + 1 + 9 + 20 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 55345761 + ... + 55352799.

It is an arithmetic number, because the mean of its divisors is an integer number (1966764800).

Almost surely, 2^389603581920 is an apocalyptic number.

389603581920 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 389603581920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (849642393600).

389603581920 is an abundant number, since it is smaller than the sum of its proper divisors (1309681205280).

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

389603581920 is a wasteful number, since it uses less digits than its factorization.

389603581920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7120 (or 7092 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The spelling of 389603581920 in words is "three hundred eighty-nine billion, six hundred three million, five hundred eighty-one thousand, nine hundred twenty".