9778228779 has 16 divisors (see below), whose sum is σ = 14224535424. Its totient is φ = 5925508800.

The previous prime is 9778228721. The next prime is 9778228807.

9778228779 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 9778228779 - 2¹³ = 9778220587 is a prime.

It is a super-2 number, since 2×9778228779² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9778228709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 517767 + ... + 536319.

It is an arithmetic number, because the mean of its divisors is an integer number (889033464).

Almost surely, 2^9778228779 is an apocalyptic number.

9778228779 is a deficient number, since it is larger than the sum of its proper divisors (4446306645).

9778228779 is a wasteful number, since it uses less digits than its factorization.

9778228779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34538.

The product of its digits is 49787136, while the sum is 66.

The square root of 9778228779 is about 98884.9269555275. The cubic root of 9778228779 is about 2138.3890968077.

The spelling of 9778228779 in words is "nine billion, seven hundred seventy-eight million, two hundred twenty-eight thousand, seven hundred seventy-nine".