9928638719 has 8 divisors (see below), whose sum is σ = 10203647520. Its totient is φ = 9653980896.

The previous prime is 9928638703. The next prime is 9928638721. The reversal of 9928638719 is 9178368299.

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

It is a cyclic number.

It is not a de Polignac number, because 9928638719 - 2⁴ = 9928638703 is a prime.

It is a super-2 number, since 2×9928638719² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9928638019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29864 + ... + 144045.

It is an arithmetic number, because the mean of its divisors is an integer number (1275455940).

Almost surely, 2^9928638719 is an apocalyptic number.

9928638719 is a deficient number, since it is larger than the sum of its proper divisors (275008801).

9928638719 is a wasteful number, since it uses less digits than its factorization.

9928638719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175489.

The product of its digits is 11757312, while the sum is 62.

The square root of 9928638719 is about 99642.5547595002. The cubic root of 9928638719 is about 2149.2976771470.

The spelling of 9928638719 in words is "nine billion, nine hundred twenty-eight million, six hundred thirty-eight thousand, seven hundred nineteen".