228006809 has 2 divisors, whose sum is σ = 228006810. Its totient is φ = 228006808.

The previous prime is 228006763. The next prime is 228006817. The reversal of 228006809 is 908600822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207504025 + 20502784 = 14405^2 + 4528^2 .

It is a cyclic number.

It is not a de Polignac number, because 228006809 - 2⁸ = 228006553 is a prime.

It is equal to p_12538880 and since 228006809 and 12538880 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (228006869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114003404 + 114003405.

It is an arithmetic number, because the mean of its divisors is an integer number (114003405).

Almost surely, 2^228006809 is an apocalyptic number.

It is an amenable number.

228006809 is a deficient number, since it is larger than the sum of its proper divisors (1).

228006809 is an equidigital number, since it uses as much as digits as its factorization.

228006809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 228006809 is about 15099.8943373787. The cubic root of 228006809 is about 610.9175557957.

The spelling of 228006809 in words is "two hundred twenty-eight million, six thousand, eight hundred nine".