8998720 has 56 divisors (see below), whose sum is σ = 21826728. Its totient is φ = 3532800.

The previous prime is 8998709. The next prime is 8998747. The reversal of 8998720 is 278998.

It can be written as a sum of positive squares in 4 ways, for example, as 46656 + 8952064 = 216^2 + 2992^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19290 + ... + 19750.

It is an arithmetic number, because the mean of its divisors is an integer number (389763).

Almost surely, 2^8998720 is an apocalyptic number.

8998720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8998720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10913364).

8998720 is an abundant number, since it is smaller than the sum of its proper divisors (12828008).

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

8998720 is a wasteful number, since it uses less digits than its factorization.

8998720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539 (or 529 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 8998720 is about 2999.7866590809. The cubic root of 8998720 is about 207.9985206995.

The spelling of 8998720 in words is "eight million, nine hundred ninety-eight thousand, seven hundred twenty".