228116857 has 4 divisors (see below), whose sum is σ = 228752640. Its totient is φ = 227481076.

The previous prime is 228116821. The next prime is 228116909. The reversal of 228116857 is 758611822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 228116857 - 2¹⁹ = 227592569 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228113857) 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, 317353 + ... + 318070.

It is an arithmetic number, because the mean of its divisors is an integer number (57188160).

Almost surely, 2^228116857 is an apocalyptic number.

It is an amenable number.

228116857 is a deficient number, since it is larger than the sum of its proper divisors (635783).

228116857 is an equidigital number, since it uses as much as digits as its factorization.

228116857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635782.

The product of its digits is 53760, while the sum is 40.

The square root of 228116857 is about 15103.5378967976. The cubic root of 228116857 is about 611.0158268986.

The spelling of 228116857 in words is "two hundred twenty-eight million, one hundred sixteen thousand, eight hundred fifty-seven".