228642242 has 4 divisors (see below), whose sum is σ = 342963366. Its totient is φ = 114321120.

The previous prime is 228642233. The next prime is 228642259. The reversal of 228642242 is 242246822.

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., 228584161 + 58081 = 15119^2 + 241^2 .

It is a junction number, because it is equal to n+sod(n) for n = 228642199 and 228642208.

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 as a sum of consecutive naturals, namely, 57160559 + ... + 57160562.

Almost surely, 2^228642242 is an apocalyptic number.

228642242 is a deficient number, since it is larger than the sum of its proper divisors (114321124).

228642242 is a wasteful number, since it uses less digits than its factorization.

228642242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114321123.

The product of its digits is 24576, while the sum is 32.

The square root of 228642242 is about 15120.9206730278. The cubic root of 228642242 is about 611.4845521813.

The spelling of 228642242 in words is "two hundred twenty-eight million, six hundred forty-two thousand, two hundred forty-two".