8728797771 has 24 divisors (see below), whose sum is σ = 13580515520. Its totient is φ = 5384712816.

The previous prime is 8728797767. The next prime is 8728797773. The reversal of 8728797771 is 1777978278.

It is not a de Polignac number, because 8728797771 - 2² = 8728797767 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8728797699 and 8728797708.

It is not an unprimeable number, because it can be changed into a prime (8728797773) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 586201 + ... + 600906.

Almost surely, 2^8728797771 is an apocalyptic number.

8728797771 is a deficient number, since it is larger than the sum of its proper divisors (4851717749).

8728797771 is a wasteful number, since it uses less digits than its factorization.

8728797771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187175 (or 1187172 counting only the distinct ones).

The product of its digits is 19361664, while the sum is 63.

The square root of 8728797771 is about 93428.0352517380. The cubic root of 8728797771 is about 2058.9769145255.

The spelling of 8728797771 in words is "eight billion, seven hundred twenty-eight million, seven hundred ninety-seven thousand, seven hundred seventy-one".