228143868 has 48 divisors (see below), whose sum is σ = 561792000. Its totient is φ = 71860608.

The previous prime is 228143857. The next prime is 228143869. The reversal of 228143868 is 868341822.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228143869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108168 + ... + 110256.

It is an arithmetic number, because the mean of its divisors is an integer number (11704000).

Almost surely, 2^228143868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228143868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280896000).

228143868 is an abundant number, since it is smaller than the sum of its proper divisors (333648132).

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

228143868 is a wasteful number, since it uses less digits than its factorization.

228143868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2594 (or 2592 counting only the distinct ones).

The product of its digits is 147456, while the sum is 42.

The square root of 228143868 is about 15104.4320647948. The cubic root of 228143868 is about 611.0399424584.

The spelling of 228143868 in words is "two hundred twenty-eight million, one hundred forty-three thousand, eight hundred sixty-eight".