228818779 has 12 divisors (see below), whose sum is σ = 266760000. Its totient is φ = 195700848.

The previous prime is 228818773. The next prime is 228818783. The reversal of 228818779 is 977818822.

It is not a de Polignac number, because 228818779 - 2³ = 228818771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228818771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18597 + ... + 28345.

It is an arithmetic number, because the mean of its divisors is an integer number (22230000).

Almost surely, 2^228818779 is an apocalyptic number.

228818779 is a deficient number, since it is larger than the sum of its proper divisors (37941221).

228818779 is an equidigital number, since it uses as much as digits as its factorization.

228818779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10242 (or 10235 counting only the distinct ones).

The product of its digits is 903168, while the sum is 52.

The square root of 228818779 is about 15126.7570549672. The cubic root of 228818779 is about 611.6418895079.

The spelling of 228818779 in words is "two hundred twenty-eight million, eight hundred eighteen thousand, seven hundred seventy-nine".