6728613394 has 8 divisors (see below), whose sum is σ = 10119979980. Its totient is φ = 3355286736.

The previous prime is 6728613337. The next prime is 6728613403. The reversal of 6728613394 is 4933168276.

It can be written as a sum of positive squares in 2 ways, for example, as 6599450169 + 129163225 = 81237^2 + 11365^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4509049 + ... + 4510540.

Almost surely, 2^6728613394 is an apocalyptic number.

6728613394 is a deficient number, since it is larger than the sum of its proper divisors (3391366586).

6728613394 is a wasteful number, since it uses less digits than its factorization.

6728613394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9019964.

The product of its digits is 1306368, while the sum is 49.

The square root of 6728613394 is about 82028.1256277382. The cubic root of 6728613394 is about 1887.8835049808.

The spelling of 6728613394 in words is "six billion, seven hundred twenty-eight million, six hundred thirteen thousand, three hundred ninety-four".