8729771020 has 12 divisors (see below), whose sum is σ = 18332519184. Its totient is φ = 3491908400.

The previous prime is 8729770993. The next prime is 8729771047. The reversal of 8729771020 is 201779278.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8729770993) and next prime (8729771047).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218244256 + ... + 218244295.

It is an arithmetic number, because the mean of its divisors is an integer number (1527709932).

Almost surely, 2^8729771020 is an apocalyptic number.

It is an amenable number.

8729771020 is an abundant number, since it is smaller than the sum of its proper divisors (9602748164).

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

8729771020 is a wasteful number, since it uses less digits than its factorization.

8729771020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436488560 (or 436488558 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 43.

The square root of 8729771020 is about 93433.2436555641. The cubic root of 8729771020 is about 2059.0534360505.

The spelling of 8729771020 in words is "eight billion, seven hundred twenty-nine million, seven hundred seventy-one thousand, twenty".