6423728 has 20 divisors (see below), whose sum is σ = 12577320. Its totient is φ = 3177984.

The previous prime is 6423721. The next prime is 6423733. The reversal of 6423728 is 8273246.

6423728 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a d-powerful number, because it can be written as 6⁸ + 4¹¹ + 2¹³ + 3² + 7⁵ + 2¹⁹ + 8³ .

It is a junction number, because it is equal to n+sod(n) for n = 6423694 and 6423703.

It is not an unprimeable number, because it can be changed into a prime (6423721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 518 + ... + 3621.

It is an arithmetic number, because the mean of its divisors is an integer number (628866).

Almost surely, 2^6423728 is an apocalyptic number.

It is an amenable number.

6423728 is a deficient number, since it is larger than the sum of its proper divisors (6153592).

6423728 is a wasteful number, since it uses less digits than its factorization.

6423728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4244 (or 4238 counting only the distinct ones).

The product of its digits is 16128, while the sum is 32.

The square root of 6423728 is about 2534.5074472173. The cubic root of 6423728 is about 185.8927195742.

The spelling of 6423728 in words is "six million, four hundred twenty-three thousand, seven hundred twenty-eight".