2648778228 has 36 divisors (see below), whose sum is σ = 7089378660. Its totient is φ = 830989056.

The previous prime is 2648778169. The next prime is 2648778241. The reversal of 2648778228 is 8228778462.

It can be written as a sum of positive squares in 2 ways, for example, as 1050537744 + 1598240484 = 32412^2 + 39978^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×2648778228³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2163423 + ... + 2164646.

It is an arithmetic number, because the mean of its divisors is an integer number (196927185).

Almost surely, 2^2648778228 is an apocalyptic number.

It is an amenable number.

2648778228 is an abundant number, since it is smaller than the sum of its proper divisors (4440600432).

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

2648778228 is a wasteful number, since it uses less digits than its factorization.

2648778228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4328096 (or 4328091 counting only the distinct ones).

The product of its digits is 4816896, while the sum is 54.

The square root of 2648778228 is about 51466.2824381167. The cubic root of 2648778228 is about 1383.6148015568.

The spelling of 2648778228 in words is "two billion, six hundred forty-eight million, seven hundred seventy-eight thousand, two hundred twenty-eight".