6728938 has 4 divisors (see below), whose sum is σ = 10093410. Its totient is φ = 3364468.

The previous prime is 6728881. The next prime is 6728947. The reversal of 6728938 is 8398276.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5774409 + 954529 = 2403^2 + 977^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6728894 and 6728903.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1682233 + ... + 1682236.

Almost surely, 2^6728938 is an apocalyptic number.

6728938 is a deficient number, since it is larger than the sum of its proper divisors (3364472).

6728938 is a wasteful number, since it uses less digits than its factorization.

6728938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3364471.

The product of its digits is 145152, while the sum is 43.

The square root of 6728938 is about 2594.0196606811. The cubic root of 6728938 is about 188.7913863314.

The spelling of 6728938 in words is "six million, seven hundred twenty-eight thousand, nine hundred thirty-eight".