228665658 has 64 divisors (see below), whose sum is σ = 510935040. Its totient is φ = 67773888.

The previous prime is 228665629. The next prime is 228665663. The reversal of 228665658 is 856566822.

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 31 ways as a sum of consecutive naturals, for example, 264535 + ... + 265397.

It is an arithmetic number, because the mean of its divisors is an integer number (7983360).

Almost surely, 2^228665658 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228665658, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255467520).

228665658 is an abundant number, since it is smaller than the sum of its proper divisors (282269382).

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

228665658 is a wasteful number, since it uses less digits than its factorization.

228665658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003.

The product of its digits is 1382400, while the sum is 48.

The square root of 228665658 is about 15121.6949446813. The cubic root of 228665658 is about 611.5054261799.

The spelling of 228665658 in words is "two hundred twenty-eight million, six hundred sixty-five thousand, six hundred fifty-eight".