228358609 has 4 divisors (see below), whose sum is σ = 232667316. Its totient is φ = 224049904.

The previous prime is 228358607. The next prime is 228358619. The reversal of 228358609 is 906853822.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 147088384 + 81270225 = 12128^2 + 9015^2 .

It is a cyclic number.

It is not a de Polignac number, because 228358609 - 2¹ = 228358607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228358601) 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, 2154274 + ... + 2154379.

It is an arithmetic number, because the mean of its divisors is an integer number (58166829).

Almost surely, 2^228358609 is an apocalyptic number.

It is an amenable number.

228358609 is a deficient number, since it is larger than the sum of its proper divisors (4308707).

228358609 is an equidigital number, since it uses as much as digits as its factorization.

228358609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4308706.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 228358609 is about 15111.5389355287. The cubic root of 228358609 is about 611.2315966429.

The spelling of 228358609 in words is "two hundred twenty-eight million, three hundred fifty-eight thousand, six hundred nine".