228442785 has 32 divisors (see below), whose sum is σ = 382364928. Its totient is φ = 116244480.

The previous prime is 228442771. The next prime is 228442853. The reversal of 228442785 is 587244822.

228442785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 228442785 - 2¹⁶ = 228377249 is a prime.

It is a super-2 number, since 2×228442785² = 104372212037112450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 220629 + ... + 221661.

It is an arithmetic number, because the mean of its divisors is an integer number (11948904).

Almost surely, 2^228442785 is an apocalyptic number.

It is an amenable number.

228442785 is a deficient number, since it is larger than the sum of its proper divisors (153922143).

228442785 is a wasteful number, since it uses less digits than its factorization.

228442785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1705.

The product of its digits is 286720, while the sum is 42.

The square root of 228442785 is about 15114.3238353557. The cubic root of 228442785 is about 611.3066900972.

The spelling of 228442785 in words is "two hundred twenty-eight million, four hundred forty-two thousand, seven hundred eighty-five".