6443229720 has 64 divisors (see below), whose sum is σ = 19953239040. Its totient is φ = 1662768000.

The previous prime is 6443229719. The next prime is 6443229731. The reversal of 6443229720 is 279223446.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 862306 + ... + 869745.

It is an arithmetic number, because the mean of its divisors is an integer number (311769360).

Almost surely, 2^6443229720 is an apocalyptic number.

6443229720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6443229720 is an abundant number, since it is smaller than the sum of its proper divisors (13510009320).

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

6443229720 is a wasteful number, since it uses less digits than its factorization.

6443229720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1732096 (or 1732092 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 39.

The square root of 6443229720 is about 80269.7310323138. The cubic root of 6443229720 is about 1860.8064603196.

The spelling of 6443229720 in words is "six billion, four hundred forty-three million, two hundred twenty-nine thousand, seven hundred twenty".