228718885 has 4 divisors (see below), whose sum is σ = 274462668. Its totient is φ = 182975104.

The previous prime is 228718879. The next prime is 228718891. The reversal of 228718885 is 588817822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 588817822 = 2 ⋅294408911.

It is an interprime number because it is at equal distance from previous prime (228718879) and next prime (228718891).

It can be written as a sum of positive squares in 2 ways, for example, as 66487716 + 162231169 = 8154^2 + 12737^2 .

It is a cyclic number.

It is not a de Polignac number, because 228718885 - 2¹¹ = 228716837 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22871884 + ... + 22871893.

It is an arithmetic number, because the mean of its divisors is an integer number (68615667).

Almost surely, 2^228718885 is an apocalyptic number.

It is an amenable number.

228718885 is a deficient number, since it is larger than the sum of its proper divisors (45743783).

228718885 is an equidigital number, since it uses as much as digits as its factorization.

228718885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45743782.

The product of its digits is 573440, while the sum is 49.

The square root of 228718885 is about 15123.4547971024. The cubic root of 228718885 is about 611.5528696460.

The spelling of 228718885 in words is "two hundred twenty-eight million, seven hundred eighteen thousand, eight hundred eighty-five".