9849978 has 32 divisors (see below), whose sum is σ = 22360320. Its totient is φ = 3212640.

The previous prime is 9849941. The next prime is 9849979. The reversal of 9849978 is 8799489.

9849978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (9849979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 598 + ... + 4478.

It is an arithmetic number, because the mean of its divisors is an integer number (698760).

Almost surely, 2^9849978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9849978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11180160).

9849978 is an abundant number, since it is smaller than the sum of its proper divisors (12510342).

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

9849978 is a wasteful number, since it uses less digits than its factorization.

9849978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3939 (or 3933 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 9849978 is about 3138.4674604017. The cubic root of 9849978 is about 214.3606606416.

The spelling of 9849978 in words is "nine million, eight hundred forty-nine thousand, nine hundred seventy-eight".