9789920 has 48 divisors (see below), whose sum is σ = 26435808. Its totient is φ = 3356160.

The previous prime is 9789887. The next prime is 9789937. The reversal of 9789920 is 299879.

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, 3251 + ... + 5490.

It is an arithmetic number, because the mean of its divisors is an integer number (550746).

Almost surely, 2^9789920 is an apocalyptic number.

It is an amenable number.

9789920 is an abundant number, since it is smaller than the sum of its proper divisors (16645888).

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

9789920 is a wasteful number, since it uses less digits than its factorization.

9789920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8763 (or 8755 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 9789920 is about 3128.8847853508. The cubic root of 9789920 is about 213.9241003729.

The spelling of 9789920 in words is "nine million, seven hundred eighty-nine thousand, nine hundred twenty".