228143785 has 8 divisors (see below), whose sum is σ = 285675840. Its totient is φ = 174579504.

The previous prime is 228143759. The next prime is 228143809. The reversal of 228143785 is 587341822.

It is a happy number.

228143785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 228143785 - 2⁵ = 228143753 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 991815 + ... + 992044.

It is an arithmetic number, because the mean of its divisors is an integer number (35709480).

Almost surely, 2^228143785 is an apocalyptic number.

It is an amenable number.

228143785 is a deficient number, since it is larger than the sum of its proper divisors (57532055).

228143785 is a wasteful number, since it uses less digits than its factorization.

228143785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1983887.

The product of its digits is 107520, while the sum is 40.

The square root of 228143785 is about 15104.4293172566. The cubic root of 228143785 is about 611.0398683585.

The spelling of 228143785 in words is "two hundred twenty-eight million, one hundred forty-three thousand, seven hundred eighty-five".