8389985520 has 160 divisors (see below), whose sum is σ = 31473128448. Its totient is φ = 1804898304.

The previous prime is 8389985519. The next prime is 8389985531. The reversal of 8389985520 is 255899838.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 118324 + ... + 175443.

Almost surely, 2^8389985520 is an apocalyptic number.

8389985520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8389985520 is an abundant number, since it is smaller than the sum of its proper divisors (23083142928).

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

8389985520 is a wasteful number, since it uses less digits than its factorization.

8389985520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293807 (or 293801 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 57.

The square root of 8389985520 is about 91596.8641384627. The cubic root of 8389985520 is about 2031.9845605601.

The spelling of 8389985520 in words is "eight billion, three hundred eighty-nine million, nine hundred eighty-five thousand, five hundred twenty".