8383121728 has 28 divisors (see below), whose sum is σ = 16638259840. Its totient is φ = 4190804352.

The previous prime is 8383121701. The next prime is 8383121737. The reversal of 8383121728 is 8271213838.

It is a congruent number.

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, 559843 + ... + 574621.

Almost surely, 2^8383121728 is an apocalyptic number.

It is an amenable number.

8383121728 is a deficient number, since it is larger than the sum of its proper divisors (8255138112).

8383121728 is a wasteful number, since it uses less digits than its factorization.

8383121728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23654 (or 23644 counting only the distinct ones).

The product of its digits is 129024, while the sum is 43.

The square root of 8383121728 is about 91559.3890761619. The cubic root of 8383121728 is about 2031.4302916477.

The spelling of 8383121728 in words is "eight billion, three hundred eighty-three million, one hundred twenty-one thousand, seven hundred twenty-eight".