8557708820 has 24 divisors (see below), whose sum is σ = 17973900000. Its totient is φ = 3422567072.

The previous prime is 8557708801. The next prime is 8557708823. The reversal of 8557708820 is 288077558.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8557708823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121451 + ... + 178509.

It is an arithmetic number, because the mean of its divisors is an integer number (748912500).

Almost surely, 2^8557708820 is an apocalyptic number.

It is an amenable number.

8557708820 is an abundant number, since it is smaller than the sum of its proper divisors (9416191180).

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

8557708820 is a wasteful number, since it uses less digits than its factorization.

8557708820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64567 (or 64565 counting only the distinct ones).

The product of its (nonzero) digits is 1254400, while the sum is 50.

The square root of 8557708820 is about 92507.8851774269. The cubic root of 8557708820 is about 2045.4357163651.

The spelling of 8557708820 in words is "eight billion, five hundred fifty-seven million, seven hundred eight thousand, eight hundred twenty".