228568009 has 8 divisors (see below), whose sum is σ = 242145288. Its totient is φ = 215005440.

The previous prime is 228567961. The next prime is 228568019. The reversal of 228568009 is 900865822.

It can be written as a sum of positive squares in 4 ways, for example, as 6110784 + 222457225 = 2472^2 + 14915^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228568009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228568019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58299 + ... + 62095.

It is an arithmetic number, because the mean of its divisors is an integer number (30268161).

Almost surely, 2^228568009 is an apocalyptic number.

It is an amenable number.

228568009 is a deficient number, since it is larger than the sum of its proper divisors (13577279).

228568009 is a wasteful number, since it uses less digits than its factorization.

228568009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7355.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 228568009 is about 15118.4658282512. The cubic root of 228568009 is about 611.4183683684.

The spelling of 228568009 in words is "two hundred twenty-eight million, five hundred sixty-eight thousand, nine".