8909720 has 32 divisors (see below), whose sum is σ = 20135520. Its totient is φ = 3548160.

The previous prime is 8909713. The next prime is 8909731. The reversal of 8909720 is 279098.

It is a super-2 number, since 2×8909720² = 158766220956800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13805 + ... + 14435.

It is an arithmetic number, because the mean of its divisors is an integer number (629235).

Almost surely, 2^8909720 is an apocalyptic number.

It is an amenable number.

8909720 is an abundant number, since it is smaller than the sum of its proper divisors (11225800).

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

8909720 is a wasteful number, since it uses less digits than its factorization.

8909720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995 (or 991 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 8909720 is about 2984.9154091867. The cubic root of 8909720 is about 207.3105252519.

The spelling of 8909720 in words is "eight million, nine hundred nine thousand, seven hundred twenty".