6738728 has 8 divisors (see below), whose sum is σ = 12635130. Its totient is φ = 3369360.

The previous prime is 6738727. The next prime is 6738751. The reversal of 6738728 is 8278376.

It can be written as a sum of positive squares in only one way, i.e., 6543364 + 195364 = 2558^2 + 442^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (6738727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421163 + ... + 421178.

Almost surely, 2^6738728 is an apocalyptic number.

It is an amenable number.

6738728 is a deficient number, since it is larger than the sum of its proper divisors (5896402).

6738728 is a wasteful number, since it uses less digits than its factorization.

6738728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842347 (or 842343 counting only the distinct ones).

The product of its digits is 112896, while the sum is 41.

The square root of 6738728 is about 2595.9060075434. The cubic root of 6738728 is about 188.8829001305.

The spelling of 6738728 in words is "six million, seven hundred thirty-eight thousand, seven hundred twenty-eight".