228688226 has 16 divisors (see below), whose sum is σ = 370480824. Its totient is φ = 105245184.

The previous prime is 228688223. The next prime is 228688247. The reversal of 228688226 is 622886822.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 168610225 + 60078001 = 12985^2 + 7751^2 .

It is a super-2 number, since 2×228688226² = 104596609422054152, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (228688223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3281 + ... + 21636.

Almost surely, 2^228688226 is an apocalyptic number.

228688226 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

228688226 is a deficient number, since it is larger than the sum of its proper divisors (141792598).

228688226 is a wasteful number, since it uses less digits than its factorization.

228688226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25285.

The product of its digits is 294912, while the sum is 44.

The square root of 228688226 is about 15122.4411389167. The cubic root of 228688226 is about 611.5255428874.

The spelling of 228688226 in words is "two hundred twenty-eight million, six hundred eighty-eight thousand, two hundred twenty-six".