6428864 has 28 divisors (see below), whose sum is σ = 13740384. Its totient is φ = 2966784.

The previous prime is 6428857. The next prime is 6428879. The reversal of 6428864 is 4688246.

It is a happy number.

It is an unprimeable number.

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, 3032 + ... + 4695.

It is an arithmetic number, because the mean of its divisors is an integer number (490728).

Almost surely, 2^6428864 is an apocalyptic number.

6428864 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

6428864 is an abundant number, since it is smaller than the sum of its proper divisors (7311520).

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

6428864 is a wasteful number, since it uses less digits than its factorization.

6428864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7752 (or 7742 counting only the distinct ones).

The product of its digits is 73728, while the sum is 38.

The square root of 6428864 is about 2535.5204593929. The cubic root of 6428864 is about 185.9422489995.

The spelling of 6428864 in words is "six million, four hundred twenty-eight thousand, eight hundred sixty-four".