9778944 has 144 divisors (see below), whose sum is σ = 31788288. Its totient is φ = 2605056.

The previous prime is 9778943. The next prime is 9778963. The reversal of 9778944 is 4498779.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 9778893 and 9778902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9778943) 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, 91339 + ... + 91445.

It is an arithmetic number, because the mean of its divisors is an integer number (220752).

Almost surely, 2^9778944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9778944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15894144).

9778944 is an abundant number, since it is smaller than the sum of its proper divisors (22009344).

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

9778944 is a wasteful number, since it uses less digits than its factorization.

9778944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 136 counting only the distinct ones).

The product of its digits is 508032, while the sum is 48.

The square root of 9778944 is about 3127.1303138820. The cubic root of 9778944 is about 213.8441232477.

The spelling of 9778944 in words is "nine million, seven hundred seventy-eight thousand, nine hundred forty-four".