228161838 has 16 divisors (see below), whose sum is σ = 463805136. Its totient is φ = 74807040.

The previous prime is 228161831. The next prime is 228161839. The reversal of 228161838 is 838161822.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 228161796 and 228161805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228161831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 311331 + ... + 312062.

It is an arithmetic number, because the mean of its divisors is an integer number (28987821).

Almost surely, 2^228161838 is an apocalyptic number.

228161838 is an abundant number, since it is smaller than the sum of its proper divisors (235643298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228161838 is a wasteful number, since it uses less digits than its factorization.

228161838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623459.

The product of its digits is 36864, while the sum is 39.

The square root of 228161838 is about 15105.0269115947. The cubic root of 228161838 is about 611.0559851125.

The spelling of 228161838 in words is "two hundred twenty-eight million, one hundred sixty-one thousand, eight hundred thirty-eight".