8973856520 has 16 divisors (see below), whose sum is σ = 20191177260. Its totient is φ = 3589542592.

The previous prime is 8973856511. The next prime is 8973856543. The reversal of 8973856520 is 256583798.

It can be written as a sum of positive squares in 2 ways, for example, as 8103960484 + 869896036 = 90022^2 + 29494^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112173167 + ... + 112173246.

Almost surely, 2^8973856520 is an apocalyptic number.

It is an amenable number.

8973856520 is an abundant number, since it is smaller than the sum of its proper divisors (11217320740).

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

8973856520 is a wasteful number, since it uses less digits than its factorization.

8973856520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224346424 (or 224346420 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 53.

The square root of 8973856520 is about 94730.4413586256. The cubic root of 8973856520 is about 2078.0677722933.

The spelling of 8973856520 in words is "eight billion, nine hundred seventy-three million, eight hundred fifty-six thousand, five hundred twenty".