8728168920 has 64 divisors (see below), whose sum is σ = 26259660000. Its totient is φ = 2320831488.

The previous prime is 8728168903. The next prime is 8728168927. The reversal of 8728168920 is 298618278.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8728168927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62325 + ... + 146084.

Almost surely, 2^8728168920 is an apocalyptic number.

It is an amenable number.

8728168920 is an abundant number, since it is smaller than the sum of its proper divisors (17531491080).

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

8728168920 is a wasteful number, since it uses less digits than its factorization.

8728168920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208772 (or 208768 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 51.

The square root of 8728168920 is about 93424.6697612574. The cubic root of 8728168920 is about 2058.9274682053.

The spelling of 8728168920 in words is "eight billion, seven hundred twenty-eight million, one hundred sixty-eight thousand, nine hundred twenty".