228672785 has 32 divisors (see below), whose sum is σ = 320060160. Its totient is φ = 155161600.

The previous prime is 228672767. The next prime is 228672791. The reversal of 228672785 is 587276822.

It is not a de Polignac number, because 228672785 - 2⁶ = 228672721 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49661 + ... + 54069.

It is an arithmetic number, because the mean of its divisors is an integer number (10001880).

Almost surely, 2^228672785 is an apocalyptic number.

It is an amenable number.

228672785 is a deficient number, since it is larger than the sum of its proper divisors (91387375).

228672785 is a wasteful number, since it uses less digits than its factorization.

228672785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4489.

The product of its digits is 752640, while the sum is 47.

The square root of 228672785 is about 15121.9305976453. The cubic root of 228672785 is about 611.5117792019.

It can be divided in two parts, 22867 and 2785, that added together give a palindrome (25652).

The spelling of 228672785 in words is "two hundred twenty-eight million, six hundred seventy-two thousand, seven hundred eighty-five".