228318685 has 12 divisors (see below), whose sum is σ = 318714588. Its totient is φ = 156561216.

The previous prime is 228318679. The next prime is 228318719. The reversal of 228318685 is 586813822.

It can be written as a sum of positive squares in 2 ways, for example, as 77053284 + 151265401 = 8778^2 + 12299^2 .

It is not a de Polignac number, because 228318685 - 2⁷ = 228318557 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 465712 + ... + 466201.

It is an arithmetic number, because the mean of its divisors is an integer number (26559549).

Almost surely, 2^228318685 is an apocalyptic number.

It is an amenable number.

228318685 is a deficient number, since it is larger than the sum of its proper divisors (90395903).

228318685 is an equidigital number, since it uses as much as digits as its factorization.

228318685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931932 (or 931925 counting only the distinct ones).

The product of its digits is 184320, while the sum is 43.

The square root of 228318685 is about 15110.2179004805. The cubic root of 228318685 is about 611.1959739694.

The spelling of 228318685 in words is "two hundred twenty-eight million, three hundred eighteen thousand, six hundred eighty-five".