228656778 has 32 divisors (see below), whose sum is σ = 530012160. Its totient is φ = 64409520.

The previous prime is 228656759. The next prime is 228656803. The reversal of 228656778 is 877656822.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 228656778.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 35358 + ... + 41321.

It is an arithmetic number, because the mean of its divisors is an integer number (16562880).

Almost surely, 2^228656778 is an apocalyptic number.

228656778 is an abundant number, since it is smaller than the sum of its proper divisors (301355382).

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

228656778 is a wasteful number, since it uses less digits than its factorization.

228656778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76762.

The product of its digits is 2257920, while the sum is 51.

The square root of 228656778 is about 15121.4013239514. The cubic root of 228656778 is about 611.4975103455.

The spelling of 228656778 in words is "two hundred twenty-eight million, six hundred fifty-six thousand, seven hundred seventy-eight".