8999520 has 48 divisors (see below), whose sum is σ = 28350000. Its totient is φ = 2399744.

The previous prime is 8999519. The next prime is 8999527. The reversal of 8999520 is 259998.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8999527) 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, 8895 + ... + 9854.

It is an arithmetic number, because the mean of its divisors is an integer number (590625).

Almost surely, 2^8999520 is an apocalyptic number.

8999520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8999520 is an abundant number, since it is smaller than the sum of its proper divisors (19350480).

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

8999520 is a wasteful number, since it uses less digits than its factorization.

8999520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18767 (or 18759 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 8999520 is about 2999.9199989333. The cubic root of 8999520 is about 208.0046843127.

The spelling of 8999520 in words is "eight million, nine hundred ninety-nine thousand, five hundred twenty".