6728401 has 2 divisors, whose sum is σ = 6728402. Its totient is φ = 6728400.

The previous prime is 6728399. The next prime is 6728437. The reversal of 6728401 is 1048276.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4946176 + 1782225 = 2224^2 + 1335^2 .

It is a cyclic number.

It is not a de Polignac number, because 6728401 - 2¹ = 6728399 is a prime.

Together with 6728399, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 6728401.

It is not a weakly prime, because it can be changed into another prime (6728441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3364200 + 3364201.

It is an arithmetic number, because the mean of its divisors is an integer number (3364201).

Almost surely, 2^6728401 is an apocalyptic number.

It is an amenable number.

6728401 is a deficient number, since it is larger than the sum of its proper divisors (1).

6728401 is an equidigital number, since it uses as much as digits as its factorization.

6728401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 6728401 is about 2593.9161513048. The cubic root of 6728401 is about 188.7863640593.

The spelling of 6728401 in words is "six million, seven hundred twenty-eight thousand, four hundred one".