9928328849 has 2 divisors, whose sum is σ = 9928328850. Its totient is φ = 9928328848.

The previous prime is 9928328803. The next prime is 9928328897. The reversal of 9928328849 is 9488238299.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8768449600 + 1159879249 = 93640^2 + 34057^2 .

It is a cyclic number.

It is not a de Polignac number, because 9928328849 - 2²⁰ = 9927280273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9928328791 and 9928328800.

It is not a weakly prime, because it can be changed into another prime (9928328549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4964164424 + 4964164425.

It is an arithmetic number, because the mean of its divisors is an integer number (4964164425).

Almost surely, 2^9928328849 is an apocalyptic number.

It is an amenable number.

9928328849 is a deficient number, since it is larger than the sum of its proper divisors (1).

9928328849 is an equidigital number, since it uses as much as digits as its factorization.

9928328849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17915904, while the sum is 62.

The square root of 9928328849 is about 99640.9998394235. Note that the first 3 decimals coincide. The cubic root of 9928328849 is about 2149.2753172573.

The spelling of 9928328849 in words is "nine billion, nine hundred twenty-eight million, three hundred twenty-eight thousand, eight hundred forty-nine".