228768777 has 12 divisors (see below), whose sum is σ = 333851700. Its totient is φ = 150939648.

The previous prime is 228768773. The next prime is 228768781. The reversal of 228768777 is 777867822.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (228768773) and next prime (228768781).

It can be written as a sum of positive squares in 2 ways, for example, as 37748736 + 191020041 = 6144^2 + 13821^2 .

It is not a de Polignac number, because 228768777 - 2² = 228768773 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228768773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130152 + ... + 131897.

It is an arithmetic number, because the mean of its divisors is an integer number (27820975).

Almost surely, 2^228768777 is an apocalyptic number.

It is an amenable number.

228768777 is a deficient number, since it is larger than the sum of its proper divisors (105082923).

228768777 is a wasteful number, since it uses less digits than its factorization.

228768777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262152 (or 262149 counting only the distinct ones).

The product of its digits is 3687936, while the sum is 54.

The square root of 228768777 is about 15125.1041979882. The cubic root of 228768777 is about 611.5973338034.

The spelling of 228768777 in words is "two hundred twenty-eight million, seven hundred sixty-eight thousand, seven hundred seventy-seven".