228209738 has 8 divisors (see below), whose sum is σ = 342411300. Its totient is φ = 114072640.

The previous prime is 228209719. The next prime is 228209767. The reversal of 228209738 is 837902822.

It can be written as a sum of positive squares in 2 ways, for example, as 225510289 + 2699449 = 15017^2 + 1643^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 228209695 and 228209704.

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 3 ways as a sum of consecutive naturals, for example, 5993 + ... + 22188.

Almost surely, 2^228209738 is an apocalyptic number.

228209738 is a deficient number, since it is larger than the sum of its proper divisors (114201562).

228209738 is a wasteful number, since it uses less digits than its factorization.

228209738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32232.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 228209738 is about 15106.6123932535. The cubic root of 228209738 is about 611.0987435538.

The spelling of 228209738 in words is "two hundred twenty-eight million, two hundred nine thousand, seven hundred thirty-eight".