228868247 has 4 divisors (see below), whose sum is σ = 228924696. Its totient is φ = 228811800.

The previous prime is 228868223. The next prime is 228868249. The reversal of 228868247 is 742868822.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228868247 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 (228868249) 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, 21629 + ... + 30422.

It is an arithmetic number, because the mean of its divisors is an integer number (57231174).

Almost surely, 2^228868247 is an apocalyptic number.

228868247 is a deficient number, since it is larger than the sum of its proper divisors (56449).

228868247 is an equidigital number, since it uses as much as digits as its factorization.

228868247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56448.

The product of its digits is 688128, while the sum is 47.

The square root of 228868247 is about 15128.3920824389. The cubic root of 228868247 is about 611.6859629897.

The spelling of 228868247 in words is "two hundred twenty-eight million, eight hundred sixty-eight thousand, two hundred forty-seven".