6728418 has 24 divisors (see below), whose sum is σ = 14726556. Its totient is φ = 2220000.

The previous prime is 6728401. The next prime is 6728437. The reversal of 6728418 is 8148276.

It can be written as a sum of positive squares in 2 ways, for example, as 6335289 + 393129 = 2517^2 + 627^2 .

It is a plaindrome in base 7.

It is a zygodrome in base 7.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33 + ... + 3668.

Almost surely, 2^6728418 is an apocalyptic number.

6728418 is an abundant number, since it is smaller than the sum of its proper divisors (7998138).

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

6728418 is a wasteful number, since it uses less digits than its factorization.

6728418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3810 (or 3807 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 6728418 is about 2593.9194282013. The cubic root of 6728418 is about 188.7865230553.

The spelling of 6728418 in words is "six million, seven hundred twenty-eight thousand, four hundred eighteen".