228681888 has 24 divisors (see below), whose sum is σ = 600290208. Its totient is φ = 76227264.

The previous prime is 228681883. The next prime is 228681889. The reversal of 228681888 is 888186822.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 228681888.

It is not an unprimeable number, because it can be changed into a prime (228681883) 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 3 ways as a sum of consecutive naturals, for example, 1190956 + ... + 1191147.

It is an arithmetic number, because the mean of its divisors is an integer number (25012092).

Almost surely, 2^228681888 is an apocalyptic number.

It is an amenable number.

228681888 is an abundant number, since it is smaller than the sum of its proper divisors (371608320).

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

228681888 is a wasteful number, since it uses less digits than its factorization.

228681888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2382116 (or 2382108 counting only the distinct ones).

The product of its digits is 786432, while the sum is 51.

The square root of 228681888 is about 15122.2315813507. The cubic root of 228681888 is about 611.5198934424.

The spelling of 228681888 in words is "two hundred twenty-eight million, six hundred eighty-one thousand, eight hundred eighty-eight".