228895009 has 4 divisors (see below), whose sum is σ = 261594304. Its totient is φ = 196195716.

The previous prime is 228895003. The next prime is 228895019. The reversal of 228895009 is 900598822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 228895009 - 2²⁷ = 94677281 is a prime.

It is a super-2 number, since 2×228895009² = 104785850290220162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228895003) 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, 16349637 + ... + 16349650.

It is an arithmetic number, because the mean of its divisors is an integer number (65398576).

Almost surely, 2^228895009 is an apocalyptic number.

It is an amenable number.

228895009 is a deficient number, since it is larger than the sum of its proper divisors (32699295).

228895009 is an equidigital number, since it uses as much as digits as its factorization.

228895009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32699294.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 228895009 is about 15129.2765524330. The cubic root of 228895009 is about 611.7098039287.

The spelling of 228895009 in words is "two hundred twenty-eight million, eight hundred ninety-five thousand, nine".