389798542440 has 384 divisors, whose sum is σ = 1381033929600. Its totient is φ = 95028111360.

The previous prime is 389798542429. The next prime is 389798542477. The reversal of 389798542440 is 44245897983.

389798542440 is a `hidden beast` number, since 3 + 8 + 9 + 79 + 85 + 42 + 440 = 666.

389798542440 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 22104907 + ... + 22122533.

It is an arithmetic number, because the mean of its divisors is an integer number (3596442525).

Almost surely, 2^389798542440 is an apocalyptic number.

389798542440 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 389798542440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (690516964800).

389798542440 is an abundant number, since it is smaller than the sum of its proper divisors (991235387160).

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

389798542440 is a wasteful number, since it uses less digits than its factorization.

389798542440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17777 (or 17770 counting only the distinct ones).

The product of its (nonzero) digits is 69672960, while the sum is 63.

The spelling of 389798542440 in words is "three hundred eighty-nine billion, seven hundred ninety-eight million, five hundred forty-two thousand, four hundred forty".