228947911 has 16 divisors (see below), whose sum is σ = 245035008. Its totient is φ = 213444000.

The previous prime is 228947909. The next prime is 228947921. The reversal of 228947911 is 119749822.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 228947911 - 2¹ = 228947909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228947921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154906 + ... + 156376.

It is an arithmetic number, because the mean of its divisors is an integer number (15314688).

Almost surely, 2^228947911 is an apocalyptic number.

228947911 is a deficient number, since it is larger than the sum of its proper divisors (16087097).

228947911 is a wasteful number, since it uses less digits than its factorization.

228947911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662.

The product of its digits is 72576, while the sum is 43.

The square root of 228947911 is about 15131.0247835366. The cubic root of 228947911 is about 611.7569262308.

The spelling of 228947911 in words is "two hundred twenty-eight million, nine hundred forty-seven thousand, nine hundred eleven".