228738811 has 32 divisors (see below), whose sum is σ = 276480000. Its totient is φ = 189072576.

The previous prime is 228738779. The next prime is 228738823. The reversal of 228738811 is 118837822.

It is not a de Polignac number, because 228738811 - 2⁵ = 228738779 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228738011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1801030 + ... + 1801156.

It is an arithmetic number, because the mean of its divisors is an integer number (8640000).

Almost surely, 2^228738811 is an apocalyptic number.

228738811 is a deficient number, since it is larger than the sum of its proper divisors (47741189).

228738811 is an equidigital number, since it uses as much as digits as its factorization.

228738811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296 (or 282 counting only the distinct ones).

The product of its digits is 43008, while the sum is 40.

The square root of 228738811 is about 15124.1135608008. The cubic root of 228738811 is about 611.5706286352.

It can be divided in two parts, 22873 and 8811, that added together give a square (31684 = 178²).

The spelling of 228738811 in words is "two hundred twenty-eight million, seven hundred thirty-eight thousand, eight hundred eleven".