6447326420 has 48 divisors (see below), whose sum is σ = 14321664000. Its totient is φ = 2432998656.

The previous prime is 6447326419. The next prime is 6447326447. The reversal of 6447326420 is 246237446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62420 + ... + 129579.

It is an arithmetic number, because the mean of its divisors is an integer number (298368000).

Almost surely, 2^6447326420 is an apocalyptic number.

It is an amenable number.

6447326420 is an abundant number, since it is smaller than the sum of its proper divisors (7874337580).

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

6447326420 is a wasteful number, since it uses less digits than its factorization.

6447326420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192104 (or 192102 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 38.

The square root of 6447326420 is about 80295.2453137793. The cubic root of 6447326420 is about 1861.2007527830.

The spelling of 6447326420 in words is "six billion, four hundred forty-seven million, three hundred twenty-six thousand, four hundred twenty".