8981720 has 64 divisors (see below), whose sum is σ = 22356000. Its totient is φ = 3220480.

The previous prime is 8981717. The next prime is 8981743. The reversal of 8981720 is 271898.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60206 + ... + 60354.

Almost surely, 2^8981720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8981720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11178000).

8981720 is an abundant number, since it is smaller than the sum of its proper divisors (13374280).

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

8981720 is a wasteful number, since it uses less digits than its factorization.

8981720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 8981720 is about 2996.9517847306. The cubic root of 8981720 is about 207.8674574719.

The spelling of 8981720 in words is "eight million, nine hundred eighty-one thousand, seven hundred twenty".