6397989950 has 72 divisors (see below), whose sum is σ = 13850113536. Its totient is φ = 2189651200.

The previous prime is 6397989911. The next prime is 6397989953. The reversal of 6397989950 is 599897936.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6397989953) 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 35 ways as a sum of consecutive naturals, for example, 71747 + ... + 133953.

It is an arithmetic number, because the mean of its divisors is an integer number (192362688).

Almost surely, 2^6397989950 is an apocalyptic number.

6397989950 is an abundant number, since it is smaller than the sum of its proper divisors (7452123586).

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

6397989950 is a wasteful number, since it uses less digits than its factorization.

6397989950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62258 (or 62242 counting only the distinct ones).

The product of its (nonzero) digits is 33067440, while the sum is 65.

The square root of 6397989950 is about 79987.4362009435. The cubic root of 6397989950 is about 1856.4411417254.

The spelling of 6397989950 in words is "six billion, three hundred ninety-seven million, nine hundred eighty-nine thousand, nine hundred fifty".