228593018 has 4 divisors (see below), whose sum is σ = 342889530. Its totient is φ = 114296508.

The previous prime is 228593017. The next prime is 228593023. The reversal of 228593018 is 810395822.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 169963369 + 58629649 = 13037^2 + 7657^2 .

It is not an unprimeable number, because it can be changed into a prime (228593017) by changing a digit.

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 as a sum of consecutive naturals, namely, 57148253 + ... + 57148256.

Almost surely, 2^228593018 is an apocalyptic number.

228593018 is a deficient number, since it is larger than the sum of its proper divisors (114296512).

228593018 is a wasteful number, since it uses less digits than its factorization.

228593018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114296511.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 228593018 is about 15119.2929067467. The cubic root of 228593018 is about 611.4406672083.

The spelling of 228593018 in words is "two hundred twenty-eight million, five hundred ninety-three thousand, eighteen".