6397730856 has 96 divisors (see below), whose sum is σ = 19363518720. Its totient is φ = 1891411200.

The previous prime is 6397730837. The next prime is 6397730869. The reversal of 6397730856 is 6580377936.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66040 + ... + 130983.

It is an arithmetic number, because the mean of its divisors is an integer number (201703320).

Almost surely, 2^6397730856 is an apocalyptic number.

6397730856 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

6397730856 is an abundant number, since it is smaller than the sum of its proper divisors (12965787864).

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

6397730856 is a wasteful number, since it uses less digits than its factorization.

6397730856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197087 (or 197080 counting only the distinct ones).

The product of its (nonzero) digits is 5715360, while the sum is 54.

The square root of 6397730856 is about 79985.8165926935. The cubic root of 6397730856 is about 1856.4160818103.

The spelling of 6397730856 in words is "six billion, three hundred ninety-seven million, seven hundred thirty thousand, eight hundred fifty-six".