228958109 has 4 divisors (see below), whose sum is σ = 235146204. Its totient is φ = 222770016.

The previous prime is 228958087. The next prime is 228958127. The reversal of 228958109 is 901859822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 901859822 = 2 ⋅450929911.

It can be written as a sum of positive squares in 2 ways, for example, as 206726884 + 22231225 = 14378^2 + 4715^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228958109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 228958109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228954109) 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, 3093992 + ... + 3094065.

It is an arithmetic number, because the mean of its divisors is an integer number (58786551).

Almost surely, 2^228958109 is an apocalyptic number.

It is an amenable number.

228958109 is a deficient number, since it is larger than the sum of its proper divisors (6188095).

228958109 is an equidigital number, since it uses as much as digits as its factorization.

228958109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6188094.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 228958109 is about 15131.3617695170. The cubic root of 228958109 is about 611.7660092350.

The spelling of 228958109 in words is "two hundred twenty-eight million, nine hundred fifty-eight thousand, one hundred nine".