228148778 has 32 divisors (see below), whose sum is σ = 415037952. Its totient is φ = 92635200.

The previous prime is 228148757. The next prime is 228148783. The reversal of 228148778 is 877841822.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4001 + ... + 21732.

It is an arithmetic number, because the mean of its divisors is an integer number (12969936).

Almost surely, 2^228148778 is an apocalyptic number.

228148778 is a deficient number, since it is larger than the sum of its proper divisors (186889174).

228148778 is a wasteful number, since it uses less digits than its factorization.

228148778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25790.

The product of its digits is 401408, while the sum is 47.

The square root of 228148778 is about 15104.5945989954. The cubic root of 228148778 is about 611.0443259272.

The spelling of 228148778 in words is "two hundred twenty-eight million, one hundred forty-eight thousand, seven hundred seventy-eight".