228124809 has 24 divisors (see below), whose sum is σ = 371484960. Its totient is φ = 138255480.

The previous prime is 228124801. The next prime is 228124823. The reversal of 228124809 is 908421822.

It is not a de Polignac number, because 228124809 - 2³ = 228124801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228124801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31647 + ... + 38180.

It is an arithmetic number, because the mean of its divisors is an integer number (15478540).

Almost surely, 2^228124809 is an apocalyptic number.

It is an amenable number.

228124809 is a deficient number, since it is larger than the sum of its proper divisors (143360151).

228124809 is a wasteful number, since it uses less digits than its factorization.

228124809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69858 (or 69841 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 228124809 is about 15103.8011440829. The cubic root of 228124809 is about 611.0229266828.

The spelling of 228124809 in words is "two hundred twenty-eight million, one hundred twenty-four thousand, eight hundred nine".