228708311 has 4 divisors (see below), whose sum is σ = 246301272. Its totient is φ = 211115352.

The previous prime is 228708287. The next prime is 228708313. The reversal of 228708311 is 113807822.

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

It is a cyclic number.

It is not a de Polignac number, because 228708311 - 2¹⁴ = 228691927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228708313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8796461 + ... + 8796486.

It is an arithmetic number, because the mean of its divisors is an integer number (61575318).

Almost surely, 2^228708311 is an apocalyptic number.

228708311 is a deficient number, since it is larger than the sum of its proper divisors (17592961).

228708311 is a wasteful number, since it uses less digits than its factorization.

228708311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17592960.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 228708311 is about 15123.1052036280. The cubic root of 228708311 is about 611.5434451805.

The spelling of 228708311 in words is "two hundred twenty-eight million, seven hundred eight thousand, three hundred eleven".