6340729860 has 72 divisors (see below), whose sum is σ = 19274988096. Its totient is φ = 1687218240.

The previous prime is 6340729859. The next prime is 6340729867. The reversal of 6340729860 is 689270436.

6340729860 is a `hidden beast` number, since 634 + 0 + 7 + 2 + 9 + 8 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (6340729867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46345 + ... + 121775.

It is an arithmetic number, because the mean of its divisors is an integer number (267708168).

Almost surely, 2^6340729860 is an apocalyptic number.

6340729860 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 6340729860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9637494048).

6340729860 is an abundant number, since it is smaller than the sum of its proper divisors (12934258236).

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

6340729860 is a wasteful number, since it uses less digits than its factorization.

6340729860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75913 (or 75908 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 6340729860 is about 79628.6999768300. The cubic root of 6340729860 is about 1850.8863403193.

The spelling of 6340729860 in words is "six billion, three hundred forty million, seven hundred twenty-nine thousand, eight hundred sixty".