228039009 has 16 divisors (see below), whose sum is σ = 334741440. Its totient is φ = 136935360.

The previous prime is 228038999. The next prime is 228039023. The reversal of 228039009 is 900930822.

It is not a de Polignac number, because 228039009 - 2¹² = 228034913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (228039509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28102 + ... + 35295.

It is an arithmetic number, because the mean of its divisors is an integer number (20921340).

Almost surely, 2^228039009 is an apocalyptic number.

It is an amenable number.

228039009 is a deficient number, since it is larger than the sum of its proper divisors (106702431).

228039009 is a wasteful number, since it uses less digits than its factorization.

228039009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63520.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 228039009 is about 15100.9605323635. The cubic root of 228039009 is about 610.9463131523.

The spelling of 228039009 in words is "two hundred twenty-eight million, thirty-nine thousand, nine".