228381658 has 8 divisors (see below), whose sum is σ = 342639828. Its totient is φ = 114168384.

The previous prime is 228381631. The next prime is 228381667. The reversal of 228381658 is 856183822.

It can be written as a sum of positive squares in 2 ways, for example, as 179479609 + 48902049 = 13397^2 + 6993^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8260 + ... + 22912.

Almost surely, 2^228381658 is an apocalyptic number.

228381658 is a deficient number, since it is larger than the sum of its proper divisors (114258170).

228381658 is a wasteful number, since it uses less digits than its factorization.

228381658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22448.

The product of its digits is 184320, while the sum is 43.

The square root of 228381658 is about 15112.3015454298. The cubic root of 228381658 is about 611.2521605025.

The spelling of 228381658 in words is "two hundred twenty-eight million, three hundred eighty-one thousand, six hundred fifty-eight".