9779812 has 36 divisors (see below), whose sum is σ = 20411244. Its totient is φ = 4085760.

The previous prime is 9779801. The next prime is 9779839. The reversal of 9779812 is 2189779.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1623076 + 8156736 = 1274^2 + 2856^2 .

It is a zygodrome in base 12.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 7428 + ... + 8644.

It is an arithmetic number, because the mean of its divisors is an integer number (566979).

Almost surely, 2^9779812 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 9779812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10205622).

9779812 is an abundant number, since it is smaller than the sum of its proper divisors (10631432).

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

9779812 is a wasteful number, since it uses less digits than its factorization.

9779812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276 (or 1267 counting only the distinct ones).

The product of its digits is 63504, while the sum is 43.

The square root of 9779812 is about 3127.2690961924. The cubic root of 9779812 is about 213.8504501479.

The spelling of 9779812 in words is "nine million, seven hundred seventy-nine thousand, eight hundred twelve".