228080309 has 4 divisors (see below), whose sum is σ = 228112716. Its totient is φ = 228047904.

The previous prime is 228080297. The next prime is 228080317. The reversal of 228080309 is 903080822.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 200307409 + 27772900 = 14153^2 + 5270^2 .

It is a cyclic number.

It is not a de Polignac number, because 228080309 - 2⁸ = 228080053 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228080339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 704 + ... + 21369.

It is an arithmetic number, because the mean of its divisors is an integer number (57028179).

Almost surely, 2^228080309 is an apocalyptic number.

It is an amenable number.

228080309 is a deficient number, since it is larger than the sum of its proper divisors (32407).

228080309 is a wasteful number, since it uses less digits than its factorization.

228080309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32406.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 228080309 is about 15102.3279331367. The cubic root of 228080309 is about 610.9831936254.

The spelling of 228080309 in words is "two hundred twenty-eight million, eighty thousand, three hundred nine".