8947664280 has 48 divisors (see below), whose sum is σ = 29079910080. Its totient is φ = 2386043712.

The previous prime is 8947664273. The next prime is 8947664287. The reversal of 8947664280 is 824667498.

It is an interprime number because it is at equal distance from previous prime (8947664273) and next prime (8947664287).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8947664287) 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 11 ways as a sum of consecutive naturals, for example, 12426952 + ... + 12427671.

It is an arithmetic number, because the mean of its divisors is an integer number (605831460).

Almost surely, 2^8947664280 is an apocalyptic number.

It is an amenable number.

8947664280 is an abundant number, since it is smaller than the sum of its proper divisors (20132245800).

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

8947664280 is a wasteful number, since it uses less digits than its factorization.

8947664280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24854640 (or 24854633 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The square root of 8947664280 is about 94592.0941728219. The cubic root of 8947664280 is about 2076.0440310529.

The spelling of 8947664280 in words is "eight billion, nine hundred forty-seven million, six hundred sixty-four thousand, two hundred eighty".