10221770728 has 16 divisors (see below), whose sum is σ = 20640114180. Its totient is φ = 4717740288.

The previous prime is 10221770723. The next prime is 10221770743. The reversal of 10221770728 is 82707712201.

10221770728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 10216762084 + 5008644 = 101078^2 + 2238^2 .

It is not an unprimeable number, because it can be changed into a prime (10221770723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49143025 + ... + 49143232.

Almost surely, 2^10221770728 is an apocalyptic number.

It is an amenable number.

10221770728 is an abundant number, since it is smaller than the sum of its proper divisors (10418343452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10221770728 is a wasteful number, since it uses less digits than its factorization.

10221770728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98286276 (or 98286272 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 37.

The spelling of 10221770728 in words is "ten billion, two hundred twenty-one million, seven hundred seventy thousand, seven hundred twenty-eight".