7778756228 has 12 divisors (see below), whose sum is σ = 13621499472. Its totient is φ = 3886899240.

The previous prime is 7778756221. The next prime is 7778756233. The reversal of 7778756228 is 8226578777.

It is not an unprimeable number, because it can be changed into a prime (7778756221) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 612650 + ... + 625217.

It is an arithmetic number, because the mean of its divisors is an integer number (1135124956).

Almost surely, 2^7778756228 is an apocalyptic number.

It is an amenable number.

7778756228 is a deficient number, since it is larger than the sum of its proper divisors (5842743244).

7778756228 is a wasteful number, since it uses less digits than its factorization.

7778756228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239442 (or 1239440 counting only the distinct ones).

The product of its digits is 18439680, while the sum is 59.

The square root of 7778756228 is about 88197.2574857064. The cubic root of 7778756228 is about 1981.3903974148.

The spelling of 7778756228 in words is "seven billion, seven hundred seventy-eight million, seven hundred fifty-six thousand, two hundred twenty-eight".