9939798 has 48 divisors (see below), whose sum is σ = 24884496. Its totient is φ = 2833920.

The previous prime is 9939773. The next prime is 9939799. The reversal of 9939798 is 8979399.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9939799) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1890 + ... + 4842.

It is an arithmetic number, because the mean of its divisors is an integer number (518427).

Almost surely, 2^9939798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9939798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12442248).

9939798 is an abundant number, since it is smaller than the sum of its proper divisors (14944698).

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

9939798 is a wasteful number, since it uses less digits than its factorization.

9939798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2989 (or 2986 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 54.

The square root of 9939798 is about 3152.7445186694. The cubic root of 9939798 is about 215.0102609128.

The spelling of 9939798 in words is "nine million, nine hundred thirty-nine thousand, seven hundred ninety-eight".