389870584918440 has 128 divisors (see below), whose sum is σ = 1207474428395520. Its totient is φ = 100600658668800.

The previous prime is 389870584918349. The next prime is 389870584918489. The reversal of 389870584918440 is 44819485078983.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27949825 + ... + 39508655.

It is an arithmetic number, because the mean of its divisors is an integer number (9433393971840).

Almost surely, 2^{389870584918440} is an apocalyptic number.

389870584918440 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 389870584918440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (603737214197760).

389870584918440 is an abundant number, since it is smaller than the sum of its proper divisors (817603843477080).

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

389870584918440 is a wasteful number, since it uses less digits than its factorization.

389870584918440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11567943 (or 11567939 counting only the distinct ones).

The product of its (nonzero) digits is 2229534720, while the sum is 78.

The spelling of 389870584918440 in words is "three hundred eighty-nine trillion, eight hundred seventy billion, five hundred eighty-four million, nine hundred eighteen thousand, four hundred forty".