8705557220 has 24 divisors (see below), whose sum is σ = 18387351864. Its totient is φ = 3462093056.

The previous prime is 8705557207. The next prime is 8705557253. The reversal of 8705557220 is 227555078.

It can be written as a sum of positive squares in 4 ways, for example, as 3743481856 + 4962075364 = 61184^2 + 70442^2 .

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 7 ways as a sum of consecutive naturals, for example, 1254569 + ... + 1261488.

It is an arithmetic number, because the mean of its divisors is an integer number (766139661).

Almost surely, 2^8705557220 is an apocalyptic number.

It is an amenable number.

8705557220 is an abundant number, since it is smaller than the sum of its proper divisors (9681794644).

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

8705557220 is a wasteful number, since it uses less digits than its factorization.

8705557220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2516239 (or 2516237 counting only the distinct ones).

The product of its (nonzero) digits is 196000, while the sum is 41.

The square root of 8705557220 is about 93303.5756013670. The cubic root of 8705557220 is about 2057.1479383463.

The spelling of 8705557220 in words is "eight billion, seven hundred five million, five hundred fifty-seven thousand, two hundred twenty".