9776778 has 32 divisors (see below), whose sum is σ = 21857472. Its totient is φ = 2889600.

The previous prime is 9776761. The next prime is 9776779. The reversal of 9776778 is 8776779.

It is a super-2 number, since 2×9776778² = 191170776122568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9776778.

It is not an unprimeable number, because it can be changed into a prime (9776779) 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 15 ways as a sum of consecutive naturals, for example, 900 + ... + 4512.

It is an arithmetic number, because the mean of its divisors is an integer number (683046).

Almost surely, 2^9776778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9776778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10928736).

9776778 is an abundant number, since it is smaller than the sum of its proper divisors (12080694).

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

9776778 is a wasteful number, since it uses less digits than its factorization.

9776778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3670.

The product of its digits is 1037232, while the sum is 51.

The square root of 9776778 is about 3126.7839707917. The cubic root of 9776778 is about 213.8283335205.

Subtracting from 9776778 its reverse (8776779), we obtain a palindrome (999999).

The spelling of 9776778 in words is "nine million, seven hundred seventy-six thousand, seven hundred seventy-eight".