6441215238 has 36 divisors (see below), whose sum is σ = 14825208060. Its totient is φ = 2020771776.

The previous prime is 6441215237. The next prime is 6441215269. The reversal of 6441215238 is 8325121446.

It is a happy number.

6441215238 is a `hidden beast` number, since 6 + 4 + 4 + 121 + 523 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6441215237) 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 17 ways as a sum of consecutive naturals, for example, 613908 + ... + 624311.

It is an arithmetic number, because the mean of its divisors is an integer number (411811335).

Almost surely, 2^6441215238 is an apocalyptic number.

6441215238 is an abundant number, since it is smaller than the sum of its proper divisors (8383992822).

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

6441215238 is a wasteful number, since it uses less digits than its factorization.

6441215238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238261 (or 1238241 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 6441215238 is about 80257.1818468603. The cubic root of 6441215238 is about 1860.6125124594.

The spelling of 6441215238 in words is "six billion, four hundred forty-one million, two hundred fifteen thousand, two hundred thirty-eight".