9779432820 has 24 divisors (see below), whose sum is σ = 27382412064. Its totient is φ = 2607848736.

The previous prime is 9779432807. The next prime is 9779432849. The reversal of 9779432820 is 282349779.

9779432820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 81495214 + ... + 81495333.

It is an arithmetic number, because the mean of its divisors is an integer number (1140933836).

Almost surely, 2^9779432820 is an apocalyptic number.

It is an amenable number.

9779432820 is an abundant number, since it is smaller than the sum of its proper divisors (17602979244).

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

9779432820 is a wasteful number, since it uses less digits than its factorization.

9779432820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162990559 (or 162990557 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 51.

The square root of 9779432820 is about 98891.0148597940. The cubic root of 9779432820 is about 2138.4768632984.

The spelling of 9779432820 in words is "nine billion, seven hundred seventy-nine million, four hundred thirty-two thousand, eight hundred twenty".