6389538128 has 20 divisors (see below), whose sum is σ = 13107950100. Its totient is φ = 3006841344.

The previous prime is 6389538097. The next prime is 6389538143. The reversal of 6389538128 is 8218359836.

It can be written as a sum of positive squares in 2 ways, for example, as 1958239504 + 4431298624 = 44252^2 + 66568^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6389538128.

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 3 ways as a sum of consecutive naturals, for example, 11745203 + ... + 11745746.

It is an arithmetic number, because the mean of its divisors is an integer number (655397505).

Almost surely, 2^6389538128 is an apocalyptic number.

6389538128 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

6389538128 is an abundant number, since it is smaller than the sum of its proper divisors (6718411972).

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

6389538128 is a wasteful number, since it uses less digits than its factorization.

6389538128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23490974 (or 23490968 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 53.

The square root of 6389538128 is about 79934.5865567590. The cubic root of 6389538128 is about 1855.6233211124.

The spelling of 6389538128 in words is "six billion, three hundred eighty-nine million, five hundred thirty-eight thousand, one hundred twenty-eight".