228326138 has 4 divisors (see below), whose sum is σ = 342489210. Its totient is φ = 114163068.

The previous prime is 228326113. The next prime is 228326143. The reversal of 228326138 is 831623822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 831623822 = 2 ⋅415811911.

It can be written as a sum of positive squares in only one way, i.e., 202692169 + 25633969 = 14237^2 + 5063^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 228326098 and 228326107.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57081533 + ... + 57081536.

Almost surely, 2^228326138 is an apocalyptic number.

228326138 is a deficient number, since it is larger than the sum of its proper divisors (114163072).

228326138 is a wasteful number, since it uses less digits than its factorization.

228326138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114163071.

The product of its digits is 27648, while the sum is 35.

The square root of 228326138 is about 15110.4645196632. The cubic root of 228326138 is about 611.2026243143.

The spelling of 228326138 in words is "two hundred twenty-eight million, three hundred twenty-six thousand, one hundred thirty-eight".