6428816 has 20 divisors (see below), whose sum is σ = 12497712. Its totient is φ = 3203616.

The previous prime is 6428813. The next prime is 6428819. The reversal of 6428816 is 6188246.

It is an interprime number because it is at equal distance from previous prime (6428813) and next prime (6428819).

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (6428813) 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, 6635 + ... + 7541.

Almost surely, 2^6428816 is an apocalyptic number.

It is an amenable number.

6428816 is a deficient number, since it is larger than the sum of its proper divisors (6068896).

6428816 is a wasteful number, since it uses less digits than its factorization.

6428816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358 (or 1352 counting only the distinct ones).

The product of its digits is 18432, while the sum is 35.

The square root of 6428816 is about 2535.5109938630. The cubic root of 6428816 is about 185.9417862298.

The spelling of 6428816 in words is "six million, four hundred twenty-eight thousand, eight hundred sixteen".