228144779 has 4 divisors (see below), whose sum is σ = 235504320. Its totient is φ = 220785240.

The previous prime is 228144767. The next prime is 228144781. The reversal of 228144779 is 977441822.

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

It is a cyclic number.

It is not a de Polignac number, because 228144779 - 2⁸ = 228144523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228134779) 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, 3679724 + ... + 3679785.

It is an arithmetic number, because the mean of its divisors is an integer number (58876080).

Almost surely, 2^228144779 is an apocalyptic number.

228144779 is a deficient number, since it is larger than the sum of its proper divisors (7359541).

228144779 is an equidigital number, since it uses as much as digits as its factorization.

228144779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7359540.

The product of its digits is 225792, while the sum is 44.

The square root of 228144779 is about 15104.4622214761. The cubic root of 228144779 is about 611.0407557707.

The spelling of 228144779 in words is "two hundred twenty-eight million, one hundred forty-four thousand, seven hundred seventy-nine".