228858985 has 4 divisors (see below), whose sum is σ = 274630788. Its totient is φ = 183087184.

The previous prime is 228858977. The next prime is 228859051. The reversal of 228858985 is 589858822.

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

It can be written as a sum of positive squares in 2 ways, for example, as 81649296 + 147209689 = 9036^2 + 12133^2 .

It is a cyclic number.

It is not a de Polignac number, because 228858985 - 2³ = 228858977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22885894 + ... + 22885903.

It is an arithmetic number, because the mean of its divisors is an integer number (68657697).

Almost surely, 2^228858985 is an apocalyptic number.

It is an amenable number.

228858985 is a deficient number, since it is larger than the sum of its proper divisors (45771803).

228858985 is an equidigital number, since it uses as much as digits as its factorization.

228858985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45771802.

The product of its digits is 3686400, while the sum is 55.

The square root of 228858985 is about 15128.0859661756. The cubic root of 228858985 is about 611.6777115002.

The spelling of 228858985 in words is "two hundred twenty-eight million, eight hundred fifty-eight thousand, nine hundred eighty-five".