228260687 has 2 divisors, whose sum is σ = 228260688. Its totient is φ = 228260686.

The previous prime is 228260677. The next prime is 228260689. The reversal of 228260687 is 786062822.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228260687 is a prime.

Together with 228260689, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228260689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114130343 + 114130344.

It is an arithmetic number, because the mean of its divisors is an integer number (114130344).

Almost surely, 2^228260687 is an apocalyptic number.

228260687 is a deficient number, since it is larger than the sum of its proper divisors (1).

228260687 is an equidigital number, since it uses as much as digits as its factorization.

228260687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 228260687 is about 15108.2986136759. The cubic root of 228260687 is about 611.1442171511.

The spelling of 228260687 in words is "two hundred twenty-eight million, two hundred sixty thousand, six hundred eighty-seven".