9983920 has 20 divisors (see below), whose sum is σ = 23212800. Its totient is φ = 3993536.

The previous prime is 9983867. The next prime is 9983929. The reversal of 9983920 is 293899.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9983929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62320 + ... + 62479.

It is an arithmetic number, because the mean of its divisors is an integer number (1160640).

Almost surely, 2^9983920 is an apocalyptic number.

It is an amenable number.

9983920 is an abundant number, since it is smaller than the sum of its proper divisors (13228880).

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

9983920 is a wasteful number, since it uses less digits than its factorization.

9983920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124812 (or 124806 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 9983920 is about 3159.7341660336. The cubic root of 9983920 is about 215.3279293524.

The spelling of 9983920 in words is "nine million, nine hundred eighty-three thousand, nine hundred twenty".