228198779 has 4 divisors (see below), whose sum is σ = 228235080. Its totient is φ = 228162480.

The previous prime is 228198749. The next prime is 228198791. The reversal of 228198779 is 977891822.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 977891822 = 2 ⋅488945911.

It is a cyclic number.

It is not a de Polignac number, because 228198779 - 2¹² = 228194683 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 228198779.

It is not an unprimeable number, because it can be changed into a prime (228198749) 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, 6017 + ... + 22194.

It is an arithmetic number, because the mean of its divisors is an integer number (57058770).

Almost surely, 2^228198779 is an apocalyptic number.

228198779 is a deficient number, since it is larger than the sum of its proper divisors (36301).

228198779 is an equidigital number, since it uses as much as digits as its factorization.

228198779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36300.

The product of its digits is 1016064, while the sum is 53.

The square root of 228198779 is about 15106.2496669425. The cubic root of 228198779 is about 611.0889614145.

The spelling of 228198779 in words is "two hundred twenty-eight million, one hundred ninety-eight thousand, seven hundred seventy-nine".