6728391698 has 16 divisors (see below), whose sum is σ = 11568620544. Its totient is φ = 2875037760.

The previous prime is 6728391679. The next prime is 6728391707. The reversal of 6728391698 is 8961938276.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 708338 + ... + 717773.

It is an arithmetic number, because the mean of its divisors is an integer number (723038784).

Almost surely, 2^6728391698 is an apocalyptic number.

6728391698 is a deficient number, since it is larger than the sum of its proper divisors (4840228846).

6728391698 is a wasteful number, since it uses less digits than its factorization.

6728391698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426457.

The product of its digits is 7838208, while the sum is 59.

The square root of 6728391698 is about 82026.7742752328. The cubic root of 6728391698 is about 1887.8627706039.

The spelling of 6728391698 in words is "six billion, seven hundred twenty-eight million, three hundred ninety-one thousand, six hundred ninety-eight".