389904440640 has 896 divisors, whose sum is σ = 1492441251840. Its totient is φ = 85001011200.

The previous prime is 389904440623. The next prime is 389904440683. The reversal of 389904440640 is 46044409983.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1062409737 + ... + 1062410103.

It is an arithmetic number, because the mean of its divisors is an integer number (1665671040).

Almost surely, 2^389904440640 is an apocalyptic number.

389904440640 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 389904440640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (746220625920).

389904440640 is an abundant number, since it is smaller than the sum of its proper divisors (1102536811200).

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

389904440640 is a wasteful number, since it uses less digits than its factorization.

389904440640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591 (or 581 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 51.

The spelling of 389904440640 in words is "three hundred eighty-nine billion, nine hundred four million, four hundred forty thousand, six hundred forty".