228339220 has 12 divisors (see below), whose sum is σ = 479512404. Its totient is φ = 91335680.

The previous prime is 228339217. The next prime is 228339229. The reversal of 228339220 is 22933822.

It can be written as a sum of positive squares in 2 ways, for example, as 107910544 + 120428676 = 10388^2 + 10974^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228339229) by changing a digit.

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, 5708461 + ... + 5708500.

It is an arithmetic number, because the mean of its divisors is an integer number (39959367).

Almost surely, 2^228339220 is an apocalyptic number.

228339220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228339220 is an abundant number, since it is smaller than the sum of its proper divisors (251173184).

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

228339220 is a wasteful number, since it uses less digits than its factorization.

228339220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11416970 (or 11416968 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 228339220 is about 15110.8973922795. The cubic root of 228339220 is about 611.2142970909.

The spelling of 228339220 in words is "two hundred twenty-eight million, three hundred thirty-nine thousand, two hundred twenty".