228168688 has 20 divisors (see below), whose sum is σ = 482266008. Its totient is φ = 103712960.

The previous prime is 228168667. The next prime is 228168697. The reversal of 228168688 is 886861822.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 648031 + ... + 648382.

Almost surely, 2^228168688 is an apocalyptic number.

It is an amenable number.

228168688 is an abundant number, since it is smaller than the sum of its proper divisors (254097320).

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

228168688 is a wasteful number, since it uses less digits than its factorization.

228168688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296432 (or 1296426 counting only the distinct ones).

The product of its digits is 589824, while the sum is 49.

The square root of 228168688 is about 15105.2536555994. The cubic root of 228168688 is about 611.0621002041.

The spelling of 228168688 in words is "two hundred twenty-eight million, one hundred sixty-eight thousand, six hundred eighty-eight".