6420001328 has 20 divisors (see below), whose sum is σ = 13395580128. Its totient is φ = 2963077440.

The previous prime is 6420001309. The next prime is 6420001337. The reversal of 6420001328 is 8231000246.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 6420001297 and 6420001306.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15432488 + ... + 15432903.

Almost surely, 2^6420001328 is an apocalyptic number.

It is an amenable number.

6420001328 is an abundant number, since it is smaller than the sum of its proper divisors (6975578800).

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

6420001328 is a wasteful number, since it uses less digits than its factorization.

6420001328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30865412 (or 30865406 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 6420001328 is about 80124.9107831017. The cubic root of 6420001328 is about 1858.5676458547.

The spelling of 6420001328 in words is "six billion, four hundred twenty million, one thousand, three hundred twenty-eight".