6328535640 has 128 divisors (see below), whose sum is σ = 21897216000. Its totient is φ = 1433230848.

The previous prime is 6328535597. The next prime is 6328535657. The reversal of 6328535640 is 465358236.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 6328535592 and 6328535601.

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 31 ways as a sum of consecutive naturals, for example, 57001 + ... + 126119.

It is an arithmetic number, because the mean of its divisors is an integer number (171072000).

Almost surely, 2^6328535640 is an apocalyptic number.

6328535640 is a gapful number since it is divisible by the number (60) 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 6328535640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10948608000).

6328535640 is an abundant number, since it is smaller than the sum of its proper divisors (15568680360).

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

6328535640 is a wasteful number, since it uses less digits than its factorization.

6328535640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69249 (or 69245 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 42.

The square root of 6328535640 is about 79552.0938756486. The cubic root of 6328535640 is about 1849.6990637843.

The spelling of 6328535640 in words is "six billion, three hundred twenty-eight million, five hundred thirty-five thousand, six hundred forty".