228755778 has 16 divisors (see below), whose sum is σ = 457747680. Its totient is φ = 76212576.

The previous prime is 228755777. The next prime is 228755827. The reversal of 228755778 is 877557822.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 228755778.

It is not an unprimeable number, because it can be changed into a prime (228755771) 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 7 ways as a sum of consecutive naturals, for example, 4326 + ... + 21822.

It is an arithmetic number, because the mean of its divisors is an integer number (28609230).

Almost surely, 2^228755778 is an apocalyptic number.

228755778 is an abundant number, since it is smaller than the sum of its proper divisors (228991902).

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

228755778 is a wasteful number, since it uses less digits than its factorization.

228755778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19681.

The product of its digits is 2195200, while the sum is 51.

The square root of 228755778 is about 15124.6744758358. The cubic root of 228755778 is about 611.5857496113.

The spelling of 228755778 in words is "two hundred twenty-eight million, seven hundred fifty-five thousand, seven hundred seventy-eight".