228818778 has 8 divisors (see below), whose sum is σ = 457637568. Its totient is φ = 76272924.

The previous prime is 228818773. The next prime is 228818783. The reversal of 228818778 is 877818822.

228818778 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (228818773) and next prime (228818783).

It is a sphenic number, since it is the product of 3 distinct primes.

228818778 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 228818778.

It is not an unprimeable number, because it can be changed into a prime (228818771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19068226 + ... + 19068237.

It is an arithmetic number, because the mean of its divisors is an integer number (57204696).

Almost surely, 2^228818778 is an apocalyptic number.

228818778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

228818778 is a wasteful number, since it uses less digits than its factorization.

228818778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38136468.

The product of its digits is 802816, while the sum is 51.

The square root of 228818778 is about 15126.7570219132. The cubic root of 228818778 is about 611.6418886169.

The spelling of 228818778 in words is "two hundred twenty-eight million, eight hundred eighteen thousand, seven hundred seventy-eight".